JP3239358B2 - Instrument equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gauge device used as, for example, an in-vehicle pointer-type meter, and more particularly to a mounting structure of a driving device for driving a pointer.

[0002]

2. Description of the Related Art Conventionally, as a driving device incorporated in this kind of meter device, for example, a coil bobbin which accommodates a rotor magnet and supports a rotating shaft fixed to the rotor magnet so as to protrude forward is used. 2. Description of the Related Art A movable magnet type instrument including a frame body and a pair of coils wound around the outer periphery of the frame body so as to intersect each other and applying a rotational force to a rotor magnet when energized is known.

[0003] The driving device constructed as described above is mechanically and electrically fixed to the front side of a circuit board for supplying a driving signal to the coil, and penetrates a rotating shaft at the front side of the driving device. Alternatively, a dial having a shaft hole to be exposed is arranged, and a pointer is attached to the tip of the rotating shaft through the shaft hole of the dial.

When the driving device is disposed in front of the circuit board as described above, the light source cannot be disposed in the region where the driving device is disposed, and the pointer is illuminated by disposing the light source near the rotation axis. Therefore, in order to efficiently illuminate the hands, there is a situation in which a light guide that guides light so as to bypass the driving device must be used.

In consideration of this point, for example, Japanese Patent Application Laid-Open
As shown in JP-A-118538, a structure in which a driving device is arranged behind a circuit board and a rotating shaft penetrates forward is advantageous. By adopting such a structure,
A light source arrangement space can be secured in the front region of the circuit board corresponding to the driving device, and the light source can be arranged near the rotation axis.

[0006]

However, according to the structure disclosed in the above-mentioned publication, a pair of protruding flanges (mounting portions) formed on the drive device are screwed and fixed to the circuit board, so that the drive device is mounted on the circuit board. Since the drive unit swings due to vibration, the pointer may sway because it is attached and fixed in a suspended state. Particularly, when the drive unit is fixed with a pair of projecting flanges, pendulum motion is likely to occur. have.

[0007] The present invention has been made in view of this point,
The main object is to provide an instrument device capable of improving vibration resistance.

[0008]

In order to achieve the above object, the present invention provides a driving device having a rotating shaft for driving a pointer protruding forward, and a driving device having the rotating shaft penetrated. and a circuit board disposed behind the drive device is extended to the circuit board and the mounting portion to be fixedly mounted on the circuit board extending to the circuit board back of the circuit board
Have a contact portion that contacts the surface, the attachment portion suitable intervals
It consists of a pair of mounting parts formed at a distance, and these mounting parts
It is characterized in that the contact portion is formed between the two.

Further, the present invention is characterized in that the driving device has a frame for holding the rotating shaft, and the mounting portion and the contact portion are formed on the frame.

Further, in the present invention, the frame houses a rotor magnet for driving the rotating shaft, and a coil for applying a rotational force to the rotor magnet is wound outside the frame.

Further, in the present invention, the coil is wound so as to intersect with each other through a winding guide portion projectingly formed on the frame body, and the mounting portion and the contact portion are formed on the winding guide portion. It is characterized by being performed.

[0012]

Further, the present invention is characterized in that the contact portion comprises a pair of contact portions formed between the mounting portions.

Further, according to the present invention, each of the mounting portions and each of the abutting portions are provided.
The parts are formed at substantially equal intervals.

[0015]

[0016]

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An instrument device according to the present invention comprises a drive device comprising, for example, a movable magnet type instrument, and a circuit board on which a drive device is arranged behind a rotating shaft. By providing a contact part that contacts the circuit board separately from the mounting part that is fixed to the circuit board,
Vibration resistance can be improved.

In the driving device, the members forming the mounting portion and the contact portion are arbitrary, but when the driving device has a frame for holding the rotating shaft, the mounting portion and the contact portion are attached to the frame. Can be formed.

In the case where the driving device is a movable magnet type instrument, a rotor magnet for driving the rotating shaft is housed, and a mounting portion and a frame are provided outside the frame around which a coil for applying a rotating force to the rotor magnet is wound. An abutment can be formed.
At this time, if the frame body has a winding guide portion at the time of coil winding, by extending this winding guide portion to the circuit board side,
You may make it provide an attachment part and a contact part.

When the mounting portion comprises a pair of mounting portions formed at appropriate intervals, it is more effective if a contact portion is formed between the pair of mounting portions.

It is also effective to form the contact portion from a pair of contact portions formed between the mounting portions.

It is more effective to form each mounting portion and each contact portion at substantially equal intervals.

As the circuit board, a circuit board for supplying a drive signal to the drive device is preferable. In this case, if a light emitting element is mounted on the front side of the circuit board corresponding to the drive device, it is advantageous for lighting. .

[0024]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing a driving device according to an embodiment of the present invention; FIG.
FIG. 2 is a sectional view of the instrument device taken along line AA of FIG.
FIG. 2 is a sectional view of the meter device taken along line BB of FIG. 1.

Referring to FIGS. 1 to 3, a driving device M for driving a pointer P is composed of a movable magnet type cross-coil instrument having a rotating shaft 1 protruding forward. Coil bobbin (frame) 3 that pivotally supports rotating shaft 1 fixed to 2 so as to protrude forward.
And a pair of coils 4 and 5 (indicated by a dashed line in FIG. 1) wound around the outer periphery of the coil bobbin 3 so as to intersect each other and apply a rotational force to the rotor magnet 2 by energization, and a required portion of the coil bobbin 3 is housed. And a cup-shaped shield case 6.

The coil bobbin 3 is formed by combining a first bobbin half body 31 and a second bobbin half body 32, the rotor magnet 2 is built in the hollow part, and the coil 4,
5 are wound substantially orthogonally, and each of the second bobbin halves 32 projects sideways and extends in a columnar shape in the axial direction of the rotating shaft 1, and is connected to a terminal portion of each of the coils 4 and 5. Four terminal mounting portions 33 which hold the current-carrying terminals 7 and function as winding guides when winding the coils 4 and 5 and four winding guides which function as winding guides when winding the coils 4 and 5 A portion 34 is formed.

Of the four winding guide portions 34, the rotating shaft 1
A pair of winding guide portions 34 facing each other with
A flange-like mounting portion 35 is formed to extend to the circuit board described later and abut on the circuit board, and a screw hole 36 is formed in the mounting portion 35.

On the other hand, the other pair of winding guide portions 34 where the mounting portion 35 is not formed has a contact portion 37 extending to the circuit board side and in contact with the circuit board.

The driving device M thus configured is mounted and fixed behind the circuit board 8 through the mounting portions 35 and the contact portions 37 so that the rotating shaft 1 penetrates forward.

The circuit board 8 is provided with a penetrating portion 81 for passing the rotating shaft 1 forward. The rotating shaft 1 protrudes forward of the circuit board 8 through the penetrating portion 81. You. In FIGS. 2 and 3, reference numeral PL denotes a dial plate with scales and characters corresponding to the hands P.

The drive device M is mounted on the circuit board 8 by tightening and fixing the screw B to the mounting portion 35 through the through hole 82 formed in the circuit board 8 and the corresponding screw hole 36 (see FIG. 2). In this fixed state, the contact portion 37 contacts the rear surface of the circuit board 8 (see FIG. 3).

A drive circuit (not shown) for supplying a drive signal corresponding to the measured amount to the drive device M is mounted on the circuit board 8. After the drive device M is fixed by the screw B, the energizing terminal 7 is connected to the circuit board 8. By soldering on the front side of
Conduction between the drive circuit and the conducting terminal 7 is achieved, whereby a drive signal is supplied to the coils 4 and 5.

Further, a light source L composed of a light emitting diode is arranged on the circuit board 8, and this light source L is located around the rotary shaft 1 in front of the circuit board 8, and both the pointer P and the dial PL are connected. Light up. As described above, if the light emitting element L is disposed on the front side of the circuit board corresponding to the driving device M, the light guide becomes unnecessary.

As described above, according to the present embodiment, the circuit board 8 is mounted on the driving device M including a movable magnet type instrument which is mounted and fixed behind the circuit board 8 so that the rotating shaft 1 passes therethrough.
The drive unit M can be stably mounted and fixed to the circuit board 8 by providing the contact portion 37 that contacts the circuit board 8 separately from the mounting portion 35 that is mounted and fixed to the circuit board 8. In addition, the inconvenience such as the wobble of the pointer caused by the wobble of the driving device M can be eliminated.

Further, in this embodiment, the mounting portion 35 is
And a pair of mounting portions 35 opposed to each other with the contact portion 37 formed between the pair of mounting portions 35, which is more effective in preventing the drive device M from swinging. .

In this embodiment, the driving device M is swung by a pair of abutting portions 37 opposed to each other with the rotating shaft 1 interposed therebetween so that the abutting portions 37 are located between the mounting portions 35. The certainty of prevention is increased.

In the present embodiment, each mounting portion 35 and each contact portion 37 are formed at substantially equal intervals, which is more effective.

The number of mounting portions 35 and contact portions 37 is arbitrary as long as the driving device M can be stably mounted and fixed.

Further, in this embodiment, the case where the mounting portion 35 is fixed by the screw B is shown, but the fixing means is optional.
For example, it may be fixed by welding.

In this embodiment, the case where the driving device M is composed of a movable magnet type cross-coil instrument is described as an example. However, the driving device is not limited to the movable magnet type cross-coil instrument.
Appropriate types can be used. For example, when the driving device is a stepping motor having a mounting member on the side opposite to the circuit board, the mounting portion and the contact portion may be formed on the mounting member.

[0041]

As described in detail above, the present invention comprises a driving device having a rotating shaft for driving the hands protruding forward, and the driving device disposed behind the rotating shaft while penetrating the rotating shaft. A driving circuit , wherein the driving device is mounted on the circuit board.
Wherein a mounting portion which is fixed extended attached to the circuit board
Have a contact portion which extends to a circuit board in contact with the rear surface of the circuit board, one of the attachment portion is formed at an appropriate interval
It consists of a pair of mounting parts, and the contact part between these mounting parts is shaped
This makes the drive device stable against the circuit board
Can be mounted and fixed, which makes it vibration resistant
And the inconvenience such as the wobble of the pointer accompanying the wobble of the drive unit
Can be eliminated .

[Brief description of the drawings]

FIG. 1 is a plan view showing a driving device according to the present invention by itself.

FIG. 2 is a sectional view of the meter device taken along line AA of FIG. 1;

FIG. 3 is a sectional view of the meter device taken along line BB of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotating shaft 2 Rotor magnet 3 Coil bobbin (frame) 4, 5 Coil 6 Shield case 7 Current-carrying terminal 8 Circuit board 9 Penetrating part 35 Mounting part 37 Contact part M Drive device P Pointer

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hitoshi Sato 2-2-234 Higashizao, Nagaoka City, Niigata Prefecture Inside Nippon Seiki Co., Ltd. (72) Masae Taguchi 2-2-234 Higashizao, Nagaoka City, Niigata Prefecture Sun Examiner in this Seiki Co., Ltd. Tetsu Ishii (56) Reference JP-A-8-304463 (JP, A) JP-A-10-293047 (JP, A) JP-A 8-152439 (JP, A) JP 8-152441 (JP, A) JP-A-9-196707 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01D 11/24 B60K 35/00 G01R 5/16

Claims (6)

(57) [Claims] 1. A driving device having a rotating shaft for driving a pointer protruding forward, and a circuit board disposed behind the driving device with the rotating shaft penetrated, the driving device comprising: have a abutment portion abutting the rear surface of the circuit board extending mounting portion which is fixedly mounted on the circuit board extending to the circuit board and the circuit board, the mounting portion is appropriate intervals
Consists of a pair of mounting parts formed with
The instrument device , wherein the contact portion is formed between the portions . 2. The instrument according to claim 1, wherein the driving device has a frame for holding the rotation shaft, and the mounting portion and the contact portion are formed on the frame. apparatus. 3. An instrument according to claim 2, wherein said frame houses a rotor magnet for driving said rotating shaft, and a coil for applying a rotational force to said rotor magnet is wound outside said frame. apparatus. 4. The coil is wound so as to intersect with each other through a winding guide portion projecting from the frame, and the mounting portion and the contact portion are formed on the winding guide portion. The instrument device according to claim 3, wherein: 5. The instrument device according to claim 1, wherein said contact portion comprises a pair of contact portions formed between said mounting portions. 6. The instrument device according to claim 1 , wherein said mounting portions and said contact portions are formed at substantially equal intervals.