JP2017109667A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device in which appearance quality is not deteriorated.SOLUTION: A display device comprises: a first housing 30 for storing a circuit board 20; and a second housing 40 arranged between an information display body 10 and the circuit board 20. The first housing 30 comprises a hole part 31d into which a screw body part S2 of a screw S can penetrate. The second housing 40 comprises a fixing part 43 which has a screw screwing part 42 to which the screw body part S1 can be screwed. The circuit board 20 comprises: a notch part 21 corresponding to the hole part 31d and the screw screwing part 42; and a holding part 22 which is held between the first housing 30 and the fixing part 43 in a screwed state in which the screw body part S2 is screwed to the screw screwing part 42. The fixing part 43 comprises a first protrusion part 43a which closes a non-closing part 21a of the notch part 21 which is not closed by the screw body part S2 in the screwed state, and butts the first housing 30.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a display device mounted on various vehicles such as an automobile.

  Conventionally, as this type of display device, for example, the one described in Patent Document 1 below is known. The instrument device described in Patent Document 1 includes a vehicle instrument mounted on a vehicle, and includes an information display body including a pointer and a display plate having a measurement value display unit such as a scale indicated by the pointer. A rigid circuit board disposed behind the information display body, a lower case (first housing) disposed behind the circuit board, and the information display body and the circuit board. It has a resin case (second housing), a facing member for defining the visible region of the information display body, and a transparent upper case (perspective panel) that covers the front side of the facing member, and is lowered by screws. The case, the circuit board, and the resin case are fixed with screws.

  In this case, the lower case includes a hole portion through which the screw main body portion of the screw excluding the screw head portion passes, and the resin case includes a fixing portion having a screw screwing portion into which the screw main body portion is screwed. The circuit board on which is stretched is provided with a circular through hole provided corresponding to the hole portion and the screw screw portion, and the screw main body portion passes through the hole portion and the through hole and is screwed into the screw screw portion. By combining, the lower case, the circuit board, and the resin case are fixed with screws.

JP 2011-21959 A

  By the way, it can be said that it is better to avoid providing a circular through-hole in a hard circuit board with a circuit pattern stretched in consideration of the work load of the artwork (pattern design) at the time of circuit board manufacture. . Therefore, in order to reduce the work load of the artwork, not only the circular through-hole but a notch portion made of, for example, a semicircular groove is provided at the edge of the circuit board, and the screw main body portion is provided with the hole portion and the notch portion. It is conceivable to fix the three members by screwing through the part and screwing into the screw threaded part.

  However, when a notch is provided on the edge of the circuit board, when the screw body is screwed into a screw threaded portion integrally formed with the resin case, the screw body portion scrapes off the inner wall surface of the screw threaded portion. It is conceivable that the resin shavings generated by this process will pass through the non-occluded portion (vacant space) of the notch portion that is not obstructed by the screw main body portion and scatter into the apparatus.

In other words, when assembling the display device, the three screws are fixed with the bottom surface of the lower case facing upward, and at the end, so that the resin scraped inside the device is scraped. It is conceivable that debris falls to the lowermost upper case side and adheres to the inner surface of the upper case. If the finished product of the assembled display device is viewed from the upper case side (located at the top), it is natural that if shavings adhere to the inner surface of the upper case or the surface of the display board (information display body) However, there is a problem that the appearance quality is deteriorated.
SUMMARY OF THE INVENTION In order to address the above-described problems, the present invention aims to provide a display device that does not cause a decrease in appearance quality.

  The present invention provides an information display body, a circuit board disposed on the opposite side of the viewer side of the information display body, a first housing that houses the circuit board, the information display body, and the circuit board. A second casing disposed between the first casing and the first casing, the first casing including a hole portion through which a screw main body portion of a screw excluding a screw head is pierced. The housing includes a fixing portion having a screwed portion in which the screw main body portion can be screwed, and the circuit board has a notch portion provided to correspond to the hole portion and the screw screwed portion. And a clamping part that is positioned around the notch part and is clamped between the first housing and the fixing part in a screwed state in which the screw main body part is screwed into the screw screwing part. The fixing portion is a non-blocking portion of the notch portion that is not closed by the screw main body portion in the screwed state. While closing, characterized in that it comprises a first protrusion abuts on the first housing.

  The present invention also provides an information display body, a circuit board disposed on the opposite side of the viewer side of the information display body, a first housing that houses the circuit board, the information display body, and the circuit. A second housing disposed between the first housing and the substrate, wherein the first housing includes a hole portion through which a screw body portion of a screw excluding a screw head can be penetrated. The housing of 2 includes a fixing portion having a screw threaded portion in which the screw main body portion can be screwed, and the circuit board is notched provided corresponding to the hole portion and the screw screwed portion. And a pinch located between the first housing and the fixing portion in a screwed state in which the screw main body portion is screwed to the screw screwing portion. And the first housing has a notch portion that is not closed by the screw body portion in the screwed state. While closing the occlusion, characterized in that it comprises a first protrusion impinging on the fixed part.

  In the present invention, the circuit board includes first and second wiring boards arranged in parallel with a gap portion connected to the notch portion, and the fixing portion is the screw body in the screwed state. A second projecting portion that abuts against the first housing is provided while closing the gap portion that is not blocked by the portion.

  In the present invention, the circuit board includes first and second wiring boards arranged in parallel with a gap connected to the notch, and the first casing is in the screwed state. A second projecting portion that abuts against the fixed portion is provided while closing the gap portion that is not blocked by the screw main body portion.

  According to the present invention, it is possible to provide a display device that can achieve the initial purpose and does not cause a decrease in appearance quality.

1 is a front view of a display device according to a first embodiment of the present invention. The disassembled perspective view which shows the display board by the same 1st Embodiment, a circuit board, the 1st, 2nd housing | casing, and a screw | thread. Sectional drawing of the principal part of the display apparatus by the 1st Embodiment. The principal part sectional drawing of the display apparatus which shows the state before screwing the screw by the said 1st Embodiment in the screw threading part. The disassembled perspective view which shows the display board by the 2nd Embodiment of this invention, a circuit board, the 1st, 2nd housing | casing, and a screw. Sectional drawing of the principal part of the display apparatus by the 2nd Embodiment. . Sectional drawing of the principal part of the display apparatus by the modification of the 1st Embodiment.

  Hereinafter, based on FIGS. 1-4, one Embodiment which applied the display apparatus of this invention to the vehicle meter mounted in a vehicle is described. In the following description, the viewer side viewing the vehicular instrument is regarded as the front side, and the side opposite to the viewer side is defined as the back side.

  1 to 3, the vehicle meter (display device) M according to the present embodiment accommodates an information display body 10, a circuit board 20 disposed behind the information display body 10, and the circuit board 20. The first casing 30, the second casing 40 disposed between the information display body 10 (a display board provided in the information display body 10 to be described later) and the circuit board 20, and the information display body 10 It has a turning member 50 for defining a visible region, and a see-through panel 60 that covers the front side of the turning member 50.

  The information display body 10 includes a pointer-type display unit such as an analog speedometer or an analog tachometer arranged side by side, and includes a pointer 11 and a display plate 12. The pointer 11 is connected to a rotating shaft of a pointer driving unit (not shown) mounted on the circuit board 20 (for example, a stepping motor), and a light-shielding cover is mounted at the center of rotation.

  The display plate 12 has an arcuate array shape along the rotation trajectory (operation range) of the pointer 11, a measurement value display unit 12 a composed of scales, numbers, and the like indicated by the pointer 11, and this measurement value display unit And a background portion 12b forming a background of 12a.

  The measurement value display unit 12a and the background unit 12b are thin plates that serve as the base material of the display plate 12, respectively, with the measurement value display unit 12a using, for example, white translucent ink and the background unit 12b using, for example, black light shielding ink. The transparent substrate (not shown) is printed on the front surface (or back surface). A viewer who visually recognizes the vehicle meter M can grasp a predetermined measurement amount (for example, the traveling speed of the vehicle) by comparing and interpreting the pointer 11 and the measurement value display unit 12a.

  The circuit board 20 is made of a hard wiring board in which a wiring pattern (not shown) is stretched around, for example, a glass epoxy base material, and the circuit driver 20 and various circuit components (not shown) such as a resistor and a capacitor. Are electrically connected to the wiring pattern.

  In addition, the circuit board 20 includes a notch portion 21 and a sandwiching portion 22 positioned around the notch portion 21. The notch 21 is formed as a substantially semicircular groove in the upper center of the circuit board 20 in FIG. 2. The notch 21 is provided in a hole and a second casing 40 described later provided in the first casing 30. It is provided corresponding to a later-described screw threaded portion provided.

  The pinching portion 22 is formed as a semi-annular portion that exists in the form of surrounding the notch portion 21 in the vicinity of the notch portion 21 as shown by a dotted line portion in FIG. 2, and the screw S excluding the screw head S1. The screw main body S2 is sandwiched between a first housing 30 and a fixing portion (to be described later) provided in the second housing 40 in a screwed state in which the screw main body S2 is screwed into the screw screwing portion.

  The first housing 30 is formed of, for example, a synthetic resin material and constitutes a lower case of the vehicle meter M. The first housing 30 has a configuration in which a bottom wall portion 31 that covers the back side of the circuit board 10 and a side wall portion 32 that holds the second housing 40 are integrally formed. 31 is arranged so as to be substantially parallel to the circuit board 20 with a predetermined clearance.

  31a is a substantially semicircular flat plate portion formed at a position one step higher than the bottom wall portion 31, and this flat plate portion 31a is provided at 31 locations on the bottom wall portion corresponding to the notch portion 21, A screw body S2 of the screw S excluding the part S1 is provided with a hole 31b provided so as to be able to pass therethrough. The hole portion 31 b is provided as a substantially circular through hole that penetrates the front and back of the flat plate portion 31 a in the first housing 30. A substantially semi-circular standing wall portion 31c is provided at a boundary portion between the bottom wall portion 31 and the flat plate portion 31a.

  The second casing 40 is formed of, for example, a white synthetic resin material, and includes a casing main body 41 that holds the display panel 12 and a screw threaded portion 42 that is provided so that the screw main body S2 can be screwed. And a fixed portion (boss portion) 43.

  The housing main body 41 is formed in a substantially flat plate shape along the back surface of the display board 12 and is disposed on the front side of the circuit board 20 so as to be in a substantially parallel state with a predetermined clearance. Yes.

  The fixing portion 43 is formed as a substantially cylindrical boss body that is suspended from the back surface of the housing main body portion 41 toward the hole portion 31d, and the screw main body portion S2 of the screw S is screwed onto the inner peripheral surface thereof. A screwing portion 42 is provided.

  In addition, the fixing portion 43 in this example is a notch portion 21 that is not blocked by the screw body portion S2 in a screwed state in which the screw body portion S2 of the screw S except the screw head portion S1 is screwed to the screw screw portion 42. The first projecting portion 43 a that abuts against the flat plate portion 31 a (first housing 30) while closing the non-occluding portion (vacant space) 21 a (see FIG. 4).

  The first projecting portion 43a is a projecting portion that projects (protrudes) from the abutting surface (tip surface) 43b that abuts on the circuit board 20 toward the flat plate portion 31a. When the screw main body portion S2 is screwed into the screw screw portion 42, the resin shaving 70 generated by the screw main body portion S2 scraping off the inner wall surface of the screw screw portion 42 is inside the apparatus (internal space of the vehicle meter M). It has a function as a scattering prevention rib to be scraped to prevent scattering.

  The facing member 50 is formed of, for example, a black synthetic resin material, and has an opening window 51 for exposing the pointer 11 and the measurement value display portion 12a of the display board 12.

  The see-through panel 60 is formed of, for example, a light-transmitting synthetic resin material, and is a cover member that covers the front side of the facing member 50, and is fixed to the second housing 40 using appropriate fixing means such as a hook. .

  The vehicle meter M is configured by the above-described units. Next, an assembling example when the three members including the circuit board 20, the first housing 30, and the second housing 40 are assembled with the screws S will be described. Here, at the time of assembling the vehicle meter M, the screw fixing of the three parties is performed most recently with the bottom surface of the first housing 30 facing upward (see FIG. 4). ).

  FIG. 4 shows a cross-sectional view of the main part of the vehicle meter M before the screw S is screwed into the screw screw portion 42. When screwing the screw S into the screw threaded portion 42, for example, the screw S is translated downward from the state of FIG. 4, and the screw body portion S2 of the screw S passes through the hole portion 31d and the notch portion 21 ( After that, the notch portion 21 is penetrated by fitting a cruciform tip of a screwdriver (not shown) into the cruciform groove S3 of the screw head S1 and applying rotational torque to the cruciform tip. It is possible to screw the screw body portion S2 in the state of being engaged with the screw screw portion 42. Then, as shown in FIG. 3, the sandwiching portion 22 of the circuit board 20 is sandwiched between the flat plate portion 31 a and the fixing portion 43.

  At this time, the screw body S2 of the screw S excluding the screw head S1 is screwed into the screw threaded portion 42 while scraping off the inner peripheral surface of the screw threaded portion 42, thereby generating a resin shaving 70. .

  Here, in the present embodiment, the fixing portion 43 is a non-blocking portion (vacant space) of the notch portion 21 that is not closed by the screw body portion S2 in the screwed state in which the screw body portion S2 is screwed to the screw screw portion 42. ) By providing the first projecting portion 43a that abuts the flat plate portion 31a while closing the 21a, the shavings 70 have a screw head S1 and a flat plate portion 31a (first housing 30) as shown in FIG. ), The holding portion 22 (circuit board 20), the fixing portion 43, and the first projecting portion 43a, and stays in the closed space region 80 as a storage space portion and scatters outside the closed space region 80 ( There is no fear of falling to the display panel 12 or the fluoroscopic panel 60 side.

  As described above, in the present embodiment, the circuit board 20 has the notch portion 21 provided corresponding to the hole portion 31d and the screw screw portion 42, and the screw main body portion S2 screwed to the screw screw portion 42. A clamping portion 22 is provided between the flat plate portion 31a (first housing 30) and the fixing portion 43 in the screwed state, and the fixing portion 43 is closed by the screw main body S2 in the screwed state. The screw main body portion S2 is screwed by providing the first projecting portion 43a that abuts against the flat plate portion 31a (first housing 30) while closing the non-closed portion (vacant space) 21a of the notched portion 21 that is not formed. The shavings 70 generated when screwed into the screwing portion 42 remain in the closed space region 80 and scatter outside the closed space region 80 (that is, on the inner surface of the fluoroscopic panel 60 and the surface of the display plate 12). Will not adhere).

  Accordingly, when the assembled vehicle instrument M after assembly is viewed from the fluoroscopic panel 60 side (located at the top), it is possible to prevent the shavings from adhering to the inner surface of the fluoroscopic panel and the surface of the display panel. It is possible to provide a vehicle instrument (display device) that does not cause a decrease.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS. 5 and 6. The same reference numerals are used for the same or corresponding parts as in the first embodiment, and the details thereof are used. The detailed explanation is omitted.

  In the second embodiment, as shown in FIG. 5, the first and second wiring boards 92 in which the circuit board 20 is arranged side by side with a gap 91 having a predetermined (for example, several millimeters) clearance therebetween. 93, and the gap portion 91 is provided in a line shape (straight shape) along the top and bottom so as to be connected to the center of the notch portion 21.

  The first and second wiring boards 92 and 93 are both hard wiring boards provided with wiring patterns, and the first wiring board 92 and the second wiring board 93 are, for example, wiring such as a flexible wiring board. It is electrically connected via a member (not shown).

  And in this 2nd Embodiment, the fixing | fixed part 43 is the non-closing part of the notch part 21 which is not obstruct | occluded by the screw main-body part S2 in the screwing state which screwed the screw main-body part S2 to the screw screwing part 42. (Vacant space) 21a, the first projecting portion 43a that abuts the flat plate portion 31a (first housing 30) and the flat plate portion 31a (first And a second protrusion 43c that abuts the housing 30).

  The second projecting portion 43c is a convex portion formed by projecting (bulging) from the contact surface (tip surface) 43b in contact with the wiring boards 92 and 93 toward the flat plate portion 31a. Similarly to the protruding portion 43a, when the screw main body portion S2 is screwed into the screw screw portion 42, the resin shaving 70 generated by the screw main body portion S2 scraping off the inner wall surface of the screw screw portion 42 is provided. It has a function as an anti-scattering rib for scraping to prevent scattering inside the device (internal space of the vehicle meter M).

  In this case, the first wiring board 92 has a first holding portion 92a that is held between the contact surface 43b and the flat plate portion 31a in the screwed state, and the second wiring board 93. Has a second clamping portion 93a that is clamped between the contact surface 43b and the flat plate portion 31a in the screwed state.

  Also in the second embodiment, as each projecting portion 43a, 43c abuts against the flat plate portion 31a, the shavings 70 are screw head S1, the flat plate portion 31a, and each projecting portion 43a as shown in FIGS. , 43c, the holding portions 92a, 93a, and the fixed portion 43, and remains in the closed space region 80, and there is no possibility of scattering outside the closed space region 80. An effect can be obtained.

  In addition, this invention is not limited by the above-mentioned embodiment and drawing. Changes (including deletion of constituent elements) can be added to the embodiments and the drawings as appropriate without departing from the scope of the present invention.

  For example, in the first embodiment, the fixing portion 43 is a non-blocking portion (empty portion) of the notch portion 21 that is not closed by the screw body portion S2 in the screwed state in which the screw body portion S2 is screwed to the screw screw portion 42. In this case, the first projecting portion 43a that abuts against the flat plate portion 31a (the first housing 30) is provided while closing the 21a. For example, FIG. 7 shows a modification of the first embodiment. Thus, the first protrusion 31d having the same shape and the same function as the first protrusion 43a employed in the first embodiment may be formed on the flat plate portion 31a side instead of the fixed portion 43 side.

  That is, in this case, the flat plate portion 31a (the first housing 30) has the notch portion 21 that is not closed by the screw body portion S2 in the screwed state in which the screw body portion S2 is screwed to the screw screw portion 42. It becomes the structure provided with the 1st protrusion part 31d which abuts against the fixing | fixed part 43, blocking the non-blocking part (vacant space) 21a. Even in this case, the shavings 70 are surrounded by the screw head S1, the flat plate portion 31a, the first projecting portion 31d, the clamping portion 22 and the fixing portion 43 as shown in FIG. Since there is no possibility of remaining in the closed space region 80 and scattering outside the closed space region 80, the same effects as those of the first embodiment can be obtained.

  In the second embodiment, the first and second projecting portions 43a and 43c are provided on the fixed portion 43. On the contrary, the flat plate portion 31a (first housing 30) is provided with the first embodiment. While providing the 1st protrusion part 31d employ | adopted in the modification of the form, you may provide the 2nd protrusion part which abbreviate | omitted the figure which abuts against the fixing | fixed part 43, closing the gap | interval part 91. FIG.

  That is, in this case, the flat plate portion 31a (the first housing 30) has the notch portion 21 that is not closed by the screw body portion S2 in the screwed state in which the screw body portion S2 is screwed to the screw screw portion 42. The first projecting portion 31d that abuts against the fixing portion 43 while closing the non-occluding portion (vacant space) 21a, and the above-described second illustration (not shown) that abuts against the fixing portion 43 while closing the gap portion 91 in the screwed state. It is the structure provided with this.

  In addition, it cannot be overemphasized that this 2nd protrusion part which abbreviate | omitted illustration has a function similar to the 2nd protrusion part 43c employ | adopted in the said 2nd Embodiment. Furthermore, for example, in the configuration of the second embodiment, the first protrusion 31d may be provided on the flat plate portion 31a, and the second protrusion 43c may be provided on the fixed portion 43.

DESCRIPTION OF SYMBOLS 10 Information display body 11 Pointer 12 Display board 12a Measurement value display part 20 Circuit board 21 Notch part 21a Non-occlusion part (vacant space)
22 Clamping portion 30 First housing 31 Bottom wall portion 31a Flat plate portion 31b Hole portion 31d, 43a First protrusion 40 Second housing 41 Housing body portion 42 Screwed portion 43 Fixing portion 43c Second portion Protruding portion 91 Gap 92 First wiring board 93 Second wiring board S Screw S1 Screw head S2 Screw body

Claims (4)

An information display;
A circuit board disposed on the side opposite to the viewer side of the information display body,
A first housing that houses the circuit board;
A second casing disposed between the information display body and the circuit board;
The first housing includes a hole portion through which a screw main body portion of a screw excluding a screw head can be passed,
The second housing includes a fixing portion having a screw threaded portion provided so that the screw main body portion can be screwed,
The circuit board is positioned around the notch and the notch provided corresponding to the hole and the screw threaded portion, and the screw main body is screwed into the screw threaded portion. A clamping part that is clamped between the first casing and the fixing part in a screwed state;
The fixing portion includes a first projecting portion that abuts against the first housing while closing a non-occluding portion of the notched portion that is not blocked by the screw main body portion in the screwed state. Display device. An information display;
A circuit board disposed on the side opposite to the viewer side of the information display body,
A first housing that houses the circuit board;
A second casing disposed between the information display body and the circuit board;
The first housing includes a hole portion through which a screw main body portion of a screw excluding a screw head can be passed,
The second housing includes a fixing portion having a screw threaded portion provided so that the screw main body portion can be screwed,
The circuit board is positioned around the notch and the notch provided corresponding to the hole and the screw threaded portion, and the screw main body is screwed into the screw threaded portion. A clamping part that is clamped between the first casing and the fixing part in a screwed state;
The first housing includes a first projecting portion that abuts against the fixing portion while closing a non-occluding portion of the notched portion that is not blocked by the screw main body portion in the screwed state. Display device. The circuit board includes first and second wiring boards arranged in parallel with a gap connected to the notch,
The said fixing | fixed part is equipped with the 2nd protrusion part which contact | abuts to the said 1st housing | casing, closing the said clearance gap which is not obstruct | occluded by the said screw main-body part in the said screwing state. The display device described. The circuit board includes first and second wiring boards arranged in parallel with a gap connected to the notch,
The said 1st housing | casing is equipped with the 2nd protrusion part which contact | abuts to the said fixing | fixed part, closing the said clearance gap which is not obstruct | occluded by the said screw main-body part in the said screwing state. The display device described.

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