JP6935695B2 - Instrument device - Google Patents

Description

The present invention relates to, for example, an instrument device having a pointer applied to a vehicle instrument, and more particularly to an instrument device characterized by fixing a display board.

Conventionally, as an instrument device of this type, for example, those described in Patent Document 1 below are known. For example, as shown in FIG. 7, the display plate 20 has three positioning holes 250 and 260, and the positioning holes 250 and 260 are fitted into the case body 30 on which the display plate 20 is placed behind the display plate 20. It has three pin shapes 340 for fitting and positioning. The three positioning holes 250 and 260 are arranged in a substantially triangular shape, and the positioning holes 250 arranged at a substantially center on the upper side of the display plate 20 are formed by round holes having a size substantially matching the pin shape 340. .. Further, the two positioning holes 260 arranged at the left and right corners on the lower side of the display plate 20 are formed so that the inner diameter dimension on the side extending toward the round hole is larger than the pin shape 340 by a predetermined dimension. The inner diameter on the orthogonal side is formed by an elongated hole having a size that matches the pin-shaped portion.

Further, the longitudinal axes of the elongated holes are formed so as to intersect at the center of the round hole. As a result, while maintaining the positioning accuracy between the parts, it is possible to prevent deterioration of the assembling property due to the dimensional error of the parts, and at the same time, the misalignment of the parts due to the difference in the coefficient of thermal expansion that differs for each part is absorbed. Therefore, it is possible to prevent the display plate 20 from being stretched between the pin shapes 340.

Further, as an instrument device of this type, for example, those described in Patent Document 2 below are known. For example, as shown in FIG. 7, the display plate 20 has an index unit 210 and includes a pointer 10 for rotating and instructing the index unit 210, and the display plate 20 is penetrated by the shaft portion of the pointer 10. The case body 30 has a pointer through hole 220, the tubular portion 320 has a tubular portion 320 that penetrates the pointer through hole 220, and a display plate 20 is provided on the outer peripheral surface of the tubular portion 320 on the tip end side. A locking claw 321 that engages with the pointer through hole 220 of the above is provided. By locking and fixing the pointer through hole 220 of the display plate 20 to the case body 30 in this way, the pointer through hole 220 is lifted from the case body 30 and comes into contact with the pointer 10 to prevent the pointer 10 from malfunctioning. doing.

Japanese Unexamined Patent Publication No. 2011-232251 Japanese Unexamined Patent Publication No. 2003-139580

However, in such a fixed structure of the display plate 20, when the locking claw 321 of the case body 30 is provided on the upper side, for example, as shown in FIG. 7, the direction in which the display plate 20 is thermally contracted is the center of the positioning hole 250. Since the direction is toward (arrow-viewing X direction), the pointer through hole 220 contracts so as to escape from the locking claw 321 and the locking claw 321 may be loosened and may come off. Therefore, it is necessary to increase the size of the locking claw 321 so that the pointer through hole 220 does not come off from the locking claw 321 even if the display plate 20 contracts, but the outer shape of the pointer cap 120 for hiding the locking claw 321 is There was room for further improvement due to design restrictions such as larger size.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide an instrument device having an excellent design that can reduce the diameter of the pointer cap.

The present invention has a display plate 2 having positioning portions 23, 24, 26 disposed at least at two positions, and positioning protrusions 34, 35, 36, which engage with the positioning portions 23, 24, 26. A case body 3 having 37 and supporting the display board 2 behind the case body 3 is provided, and the case body 3 has a locking portion 32a that penetrates the display board 2 and locks the front surface of the display board 2. a, the display panel 2 is engaged with the locking portion 32a, have a end portion 22a is provided on the straight line L1, L2 connecting the one positioning portion 23, 26 and the other positioning portion 24 and 26 The straight lines L1 and L2 are characterized in that they are located in a substantially horizontal direction in a direction in which the display plate 2 is visually recognized.

The present invention is also characterized in that the locking portion 32a is located on the straight lines L1 and L2.

The present invention is also characterized in that the end portion 22a is located between the one positioning portion 23, 26 and the other positioning portion 24, 26.

The present invention is also characterized in that the positioning portions 23, 24, 26 position at least in a direction orthogonal to the straight lines L1 and L2.

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In the present invention, the display board 2 also has an index unit 21, a pointer 1 for instructing the index unit 21, a pointer driving unit 5 having a shaft portion 51 for operating the pointer 1, and the pointer driving unit. A circuit board 4 that holds 5 and is disposed behind the case body 3 is provided, and the end portion 22a is provided in the vicinity of the pointer 1.

The present invention is also characterized in that the positioning centers 36 and 41 of the circuit board 4 and the case body 3 are located on the straight lines L1 and L2.

According to the instrument device according to the present invention, it is possible to provide an instrument device having an excellent design that can reduce the diameter of the pointer cap.

The front view which shows the 1st Embodiment of this invention. An enlarged view of the main part Z with the pointer 1 in FIG. 1 as a broken line. The figure which shows only the display board 2 of FIG. Cross-sectional view taken along the line AA in FIG. The front view which shows the 2nd Embodiment of this invention. FIG. 5 is a cross-sectional view taken along the line BB in FIG. Front view showing the prior art.

Hereinafter, the first embodiment of the present invention will be described with reference to FIGS. 1 to 4. In addition, the vertical, horizontal, and front-back directions of the instrument device are indicated by arrows in each figure. The instrument device for a vehicle includes a pointer 1, a display board 2, a case body 3, and a circuit board 4.

The pointer 1 is a pointing unit 11 made of a translucent resin (for example, PC: polycarbonate), a pointer cap 12 made of a light-shielding resin (for example, ABS: acrylonitrile butadiene styrene), and a rotating shaft of a pointer driving unit 5 described later. It has a boss portion 13 made of a light-shielding resin (for example, ABS) into which 51 is press-fitted, and an index portion 21 described later is instructed by the indicator portion 11. The indicator portion 11 and the boss portion 13 are integrally formed by two-color molding or the like. The indicator 11 is emitted by illumination light emitted from a plurality of first light emitting elements 6 mounted on the front surface side of the circuit board 4.

The display plate 2 is made of a translucent sheet-like resin (for example, PC). Further, the display plate 2 has a pointer hole 22 formed in a circular shape in a front view and hidden by the pointer cap 12 at a position corresponding to the rotation shaft 51 of the pointer driving unit 5, which will be described later. The pointer hole 22 has a straight portion (end portion) 22a having a linear shape as if a part of the pointer hole 22 is cut out in a straight line.

Further, the display board 2 has a light-shielding black printing layer printed on the front and back surfaces of the sheet, and the scales, numbers, and units that serve as the design of the vehicle speedometer, engine tachometer, etc. form the black printing layer. It has an index unit 21 formed by not being printed. The index unit 21 is arranged in an arc shape centered on the pointer hole 22. The index unit 21 is transmitted and illuminated by the illumination light emitted from the plurality of second light emitting elements 7 mounted on the front surface side of the circuit board 4.

The circuit board 4 is made of a hard printed circuit board in which various circuits are formed on a base material made of a flat glass epoxy base material, and is arranged on the rear side of the display board 2. Although detailed illustrations are omitted, various circuits are formed with a drive circuit, a light emitting circuit, and the like composed of wiring patterns, resistors, capacitors, and the like. Further, the circuit board 4 includes a pointer driving unit 5 mounted on the rear surface side, a first light emitting element 6 mounted on the front surface side, and a second light emitting element 7. The first light emitting element 6 is arranged at a position corresponding to the pointer cap 12, and the second light emitting element 7 is arranged at a position corresponding to the index unit 21.

The pointer drive unit 5 includes a movable magnet type drive device, a stepping motor, and the like. Further, the pointer driving unit 5 has a rotating shaft (shaft portion) 51 penetrating the circuit board 4 toward the display plate 2, and the pointer 1 is attached by inserting the boss portion 13 into the tip of the rotating shaft 51. Has been done.

Further, the pointer drive unit 5 is driven by a drive circuit based on a control signal supplied from the control unit. Then, the rotation shaft 51 rotates at a rotation angle according to the control signal. As a result, the pointer 1 rotates at a predetermined rotation angle according to the speed of the vehicle, the rotation speed of the engine, or the like, and the indicator unit 11 indicates the index unit 21, thereby configuring the speedometer and the engine tachometer. ..

The first light emitting element 6 and the second light emitting element 7 are composed of a light emitting diode or the like. Further, the first light emitting element 6 and the second light emitting element 7 are driven based on a control signal supplied from the control unit, and are turned on / off according to an illumination switch or the like operated by the vehicle driver.

The case body 3 is made of a white synthetic resin (for example, PP: polypropylene) and is arranged between the display board 2 and the circuit board 4, supports the display board 2 on the front surface, and fixes the circuit board 4 on the rear surface. ing. Further, the case body 3 is a cylinder formed so that the front end abuts on the rear surface of the display plate 2, the rear end abuts on the front surface of the circuit board 4, and surrounds the rotation shaft 51 and the first light emitting element 6. It has a first cylindrical portion 31 having a shape. The first tubular portion 31 is a light-shielding wall that prevents the illumination light emitted by the first light emitting element 6 and the illumination light emitted by the second light emitting element 7 from being mixed.

Further, the case body 3 has a second tubular portion 32 that penetrates the pointer hole 22 on the display plate 2 side, extends to the front surface of the display plate 2, and is integrally formed with the first tubular portion 31. The second tubular portion 32 projects in an eaves shape so as to overlap the display plate 2 in a direction orthogonal to the straight line of the straight line portion 22a on the front surface side of the display plate 2 on the outer peripheral surface thereof, and locks the straight line portion 22a. It has a part 32a. The locking portion 32a overlaps with the straight portion 22a so that the minimum overlap is maintained even if the display plate 2 and the case body 3 are deformed due to thermal contraction and thermal expansion. Further, since the case body 3 is formed by opening the molding die in the front-rear direction, the circuit board 4 side of the locking portion 32a has a hole shape, and a part of the straight portion 22a is inserted into that portion. It is locked.

By forming in this way, the pointer hole 22 is locked and fixed to the locking portion 32a, so that the pointer hole 22 rises from the case body 3 and interferes with the pointer cap 12 to prevent the pointer 1 from malfunctioning. Has been done.

Further, the case body 3 has positioning protrusions 34 and 35 that project from the mounting surface 33 of the display plate 2 in a cylindrical shape and are fitted with the display plate 2 for positioning. The positioning protrusions 34 and 35 are arranged in a substantially triangular shape at three positions apart from each other, and the first positioning protrusions (positioning protrusions) 34 are arranged at substantially the center of the outer periphery of the display plate 2 on the upper side of the instrument device. A second positioning protrusion (positioning protrusion) 35 is provided at each of the left and right substantially corners of the outer periphery of the display plate 2 on the lower side of the instrument device.

Further, the display plate 2 has positioning holes 23 and 24 for fitting with the case body 3 and performing positioning at positions corresponding to the positioning protrusions 34 and 35, respectively. The positioning holes 23 and 24 are formed of round holes having a size substantially matching the size of the first positioning protrusion 34, and the first positioning hole (positioning portion) 23 and the first positioning hole (positioning portion) 23 that fit with the first positioning protrusion 34. The inner diameter of the side extending toward the positioning protrusion 34 is larger than that of the second positioning protrusion 35 by a predetermined dimension, and the inner diameter of the side orthogonal to the inner diameter is formed by an elongated hole having a size substantially matching that of the second positioning protrusion 35. It has left and right second positioning holes (positioning portions) 24 that engage with the second positioning protrusion 35. The outer shape side of the display plate 2 of the first positioning hole 23 and the second positioning hole 24 has a notch shape.

Here, the predetermined dimension means that the display plate 2 has the positioning protrusions 34 and 35 even if the instrument device undergoes thermal contraction and thermal expansion during a predetermined temperature (for example, between -30 ° C and + 80 ° C.). It is the size of the gap set so that it does not stretch between them.

Further, the straight line portion 22a coincides with the straight line connecting the first positioning hole 23 and the second positioning hole 24 or the straight line L1 connecting the first positioning protrusion 34 and the second positioning protrusion 35. It is arranged and formed between the first positioning hole 23 and the second positioning hole 24, or between the first positioning protrusion 34 and the second positioning protrusion 35. As a result, the straight portion 22a is formed at a position of approximately 2 o'clock in the pointer hole 22 on the right side (upper right direction in the figure) and approximately 10 o'clock in the pointer hole 22 on the left side (upper left direction in the figure). The first positioning hole 23 and the second positioning hole 24 are positioned at least in a direction orthogonal to the straight line L1 (movement is restricted).

Due to this formation, when the display plate 2 is thermally contracted, the straight line portion 22a contracts toward the first positioning hole 23 along the straight line L1. That is, the locking portion 32a is located on the straight line L1 and contracts in the direction parallel to the straight line of the straight line portion 22a, and the contraction in the direction orthogonal to the straight line of the straight line portion 22a is very small. There is little change in the engagement amount of the straight portion 22a. That is, it is possible to provide an instrument device having a highly safe fixed structure in which the straight portion 22a is less likely to come off from the locking portion 32a.

Further, since the locking portion 32a can be made smaller than the case where the straight portion 22a is not located on the straight line L1, the outer diameter of the pointer cap 12 for hiding the locking portion 32a can be made smaller, and the design property can be reduced. It can be an excellent instrument device.

Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. 5 and 6. The straight portion 22a of the pointer hole 22 is formed at a position facing the direction of the pointer hole 22 at approximately 12 o'clock (upward in the figure). Similarly, the locking portion 32a is also formed at a position facing the direction of approximately 12 o'clock of the second tubular portion 32.

The third positioning protrusion (positioning protrusion) 36 is arranged at a substantially central portion of the outer periphery of the display plate 2 on the upper side of the instrument device as in the first embodiment, and is arranged in the left-right direction with a certain parallel gap. Sides 36a, which are symmetrically arranged with respect to the display plate 2 and face the outer shape of the display plate 2, are formed at intervals of a predetermined dimension from the display plate 2. The fourth positioning protrusion (positioning protrusion) 37 is arranged on the left and right sides of the outer periphery of the display plate 2 on the extension line (straight line) L2 extending in parallel with the straight line of the straight line portion 22a. The extension line L2 is located substantially horizontally in the direction in which the index unit 21 is visually recognized, and is also a straight line connecting the left and right fourth positioning protrusions 37.

The third positioning hole (positioning portion) 25 is formed so as to project from the outer shape of the display plate 2 with a width substantially matching the constant gap of the third positioning protrusion 36, and is engaged with the third positioning protrusion 36. The length of the fourth positioning hole (positioning portion) 26 is such that the inner diameter dimension in the left-right direction is larger than that of the fourth positioning protrusion 37 by a predetermined dimension, and the inner diameter dimension in the vertical direction is substantially the same as that of the second positioning protrusion 35. It is formed by a hole and is engaged with a fourth positioning protrusion 37. The outer shape of the display plate 2 of the third positioning hole 25 and the fourth positioning hole 26 has a notch shape. The third positioning hole 25 and the fourth positioning hole 26 are positioned at least in a direction orthogonal to the extension line L2 (movement is restricted).

Due to this formation, when the display plate 2 is thermally contracted, the straight portion 22a contracts along the extension line L2. That is, the locking portion 32a is located on the extension line L2 and contracts in the direction parallel to the straight line of the straight portion 22a, and the contraction of the straight portion 22a in the vertical direction is very small. It is possible to provide an instrument device having a fixed structure in which the linear portion 22a with little change in the engagement amount is less likely to come off from the locking portion 32a.

Further, since the locking portion 32a can be made smaller than the case where the straight portion 22a is not located on the extension line L2, the outer diameter of the pointer cap 12 for hiding the locking portion 32a can be made smaller, and the design property can be reduced. It can be an excellent instrument device.

Further, since the locking portion 32a is formed so as to face the same direction, the straight portion 22a can be easily hooked on the locking portion 32a, and the display plate 2 can be easily assembled to the case body 3. Productivity can be improved.

Further, the case body 3 protrudes toward the circuit board 4 in a cylindrical shape, and a fifth positioning protrusion (positioning center) 37 for positioning with the circuit board 4 is formed so as to protrude. Further, the circuit board 4 is formed of a round hole having a size substantially matching with the fifth positioning protrusion 38, and is provided with a board positioning hole (positioning center) 41 into which the fifth positioning protrusion 38 is inserted and fitted. There is. The fifth positioning protrusion 38 and the substrate positioning hole 41 are arranged between the left and right second positioning protrusions 35 on the extension line L2 of the straight line portion 22a.

Due to this formation, when the case body 3 is thermally contracted, the locking portion 32a contracts along the extension line L2. That is, the locking portion 32a is located on the extension line L2 and contracts in the direction parallel to the straight line of the straight portion 22a, and the contraction of the straight portion 22a in the vertical direction is very small. It is possible to provide an instrument device having a fixed structure in which the linear portion 22a with little change in the engagement amount is less likely to come off from the locking portion 32a.

Further, since the locking portion 32a can be made smaller than the case where the straight portion 22a is not located on the extension line L2, the outer diameter of the pointer cap 12 for hiding the locking portion 32a can be made smaller. It can be an instrument device with excellent designability.

Although the instrument device of the present invention has been described by taking the configuration of the above-described embodiment as an example, the present invention is not limited to this, and other configurations are not deviated from the gist of the present invention. Of course, various improvements and design changes are possible.

The present invention relates to an instrument device for a vehicle, and can be applied to, for example, an instrument device for a vehicle mounted on a moving body including an automobile, a motorcycle, or an agricultural machine or a construction machine.

1 Guideline 2 Display board 21 Index part 22a Straight part (end)
23 First positioning hole (positioning part)
24 Second positioning hole (positioning part)
26 Fourth positioning hole (positioning part)
3 Case body 32a Locking part 34 First positioning protrusion (positioning protrusion),
35 Second positioning protrusion (positioning protrusion)
36 Third positioning protrusion (positioning protrusion),
37 Fourth positioning protrusion (positioning protrusion)
38 Fifth positioning protrusion (positioning center)
4 Circuit board 41 Board positioning hole (positioning center)
5 Pointer drive unit 51 Rotating shaft (shaft part)
L1 straight line L2 extension line (straight line)

Claims (6)

A display board having positioning portions arranged at least two places apart from each other.
A case body having a positioning protrusion that engages with the positioning portion and supporting the display plate behind the case body is provided, and the case body penetrates the display plate and locks the front surface of the display plate. has a section, the panel is engaged with the locking portion, have a end portion provided on a straight line connecting one of the positioning portion and the other positioning portion, said straight line, viewing the display panel An instrument device characterized in that it is located in a substantially horizontal direction in the direction of movement. The instrument device according to claim 1, wherein the locking portion is located on the straight line. The instrument device according to any one of claims 1 to 2, wherein the end portion is located between the one positioning portion and the other positioning portion. The instrument device according to any one of claims 1 to 3, wherein the positioning unit positions at least a direction orthogonal to the straight line. The display board has an index unit and has an index unit.
A guideline for instructing the index unit and
A pointer drive unit having a shaft portion for operating the pointer, and a pointer drive unit.
A circuit board that holds the pointer driving unit and is disposed behind the case body is provided.
The instrument device according to any one of claims 1 to 4 , wherein the end portion is provided in the vicinity of the pointer. The instrument device according to claim 5 , wherein the positioning center of the circuit board and the case body is located on the straight line.

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