JPH0632578Y2 - Board mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a board mounting device, and more particularly, a board mounting method in which two boards are arranged so as to cross each other in a lamp box that divides a plurality of lighting chambers. Regarding the device.

[Conventional technology]

Generally, the lamp box equipped in the vehicle instrument is the state of various equipment of the vehicle, such as operation indications such as the indication direction of the direction indicator and the position of the gear position, and various alarm indications such as fuel shortage and cooling water temperature rise. Corresponding to the partition wall is divided into a plurality of illumination chambers, by lighting the illumination lamps provided at the bottom of each illumination chamber, the display lens fitted in the front opening of each illumination chamber is transmitted and illuminated. There is.

Further, each of the illumination lamps is mounted on a flat plate-shaped substrate that constitutes a drive circuit for controlling blinking of the illumination lamp, and insertion holes are formed at the bottoms of the illumination chambers. By assembling to the lamp box, each illumination lamp provided on the substrate is inserted and arranged in each illumination chamber through the insertion hole (for example, disclosed in Japanese Utility Model Publication No. 61-152915). ing).

By the way, in recent years, a lamp box that performs an operation display and an alarm display of this kind tends to be more multifunctional, a driving circuit of an illumination lamp is complicated, and it is necessary to mount a large number of electronic components on a substrate. The size of the substrate is inevitably increased. However, there is a tendency for downsizing of the entire device especially in this kind of instrument, so normally, by forming a plurality of substrates for the lamp box, the substrates are electrically connected to each other to electrically connect the drive circuit. Are assembled into the lamp box and assembled into the lamp box.

When assembling a plurality of substrates in the lamp box as described above, for example, as disclosed in Japanese Utility Model Application Laid-Open No. 60-106393, two substrates are arranged in parallel with a gap and both substrates are spacers. It is known that they are integrally assembled and fixed. However, in this case, since two parallel boards are assembled on the rear surface side of the lamp box, the depth dimension of the lamp box increases over the entire area of the board, which is one of the factors that hinders the thinning of this kind of instrument.
The number of parts was increased because a spacer was required.

Therefore, when making the lamp box thinner, for example,
A mounting structure has been proposed in which a board on which each illuminating lamp is mounted and a board on which a large number of electronic components are mounted are arranged in an intersecting state, and only one board is provided on the rear surface side of the lamp box. There is. Various types have been proposed for simply disposing two substrates in an intersecting state.
As disclosed in Japanese Laid-Open Patent Application No. 58-55787 and Japanese Utility Model Publication No. 56-12874, one of the two substrates is provided with a locking projection, and the other is provided with an insertion hole. It is known that both parts are integrally assembled by inserting and engaging the part into the insertion hole part.

[Problems to be solved by the device]

In the above-mentioned conventional example, it is necessary to form an insertion hole portion for inserting the locking projection in one of the boards, and this insertion hole portion not only causes a reduction in wiring space on the board, but also There is a problem that the circuit pattern design cannot be freely selected due to the restriction of the holes.

Further, when it is attempted to house and arrange the lamp in the lamp box in the assembled state of the board of the conventional example, when arranging the illuminating lamp to be mounted on one board in each illuminating chamber inside the lamp box, the boards intersecting each other are Since they are assembled and fixed together, when aligning the insertion hole provided in the bottom of each lighting room with the lighting mounted on one board due to assembly error of each board or molding error of the lamp box, etc. This causes misalignment, which makes it difficult for each lighting to enter each insertion hole, and not only is it troublesome to assemble the board,
If it is forcibly assembled, stress concentrates on the lamp, and in the worst case, the terminal part of the lamp may be broken.

Therefore, the present invention provides a board mounting device that can effectively use the wiring space of the board and also can simplify the work of mounting the board and at the same time maintain stable electrical connection between the board and the illumination lamp. To aim.

[Means for Solving the Problems]

The present invention provides a lamp box in which a plurality of lighting chambers are defined, and a plurality of lighting lamps inserted and arranged in the lighting chamber,
A first board on which these illuminating lamps are mounted and arranged, a second board arranged in a direction intersecting with the first board, and the lamp box are formed, and each of the boards is independently formed in the lamp box. And a holding part that temporarily stops in an intersecting state,
The lamp box is housed inside, and a case for sandwiching and fixing each of the substrates with the lamp box is provided.

[Action]

The first and second substrates arranged in the intersecting direction are temporarily fixed in the lamp box so that they are integrated via the lamp box.

When the first board on which the plurality of illuminating lamps are mounted is temporarily held by the lamp box, the respective illuminating lamps are inserted and arranged in the illuminating chamber of the lamp box, and the lamp box and the case are fixed so that the first and second illuminating lamps are fixed. The substrate is sandwiched and fixed between the lamp box and the case.

〔Example〕

An embodiment of the present invention will be described below with reference to the accompanying drawings.

1 to 4 show an embodiment of the present invention. In FIG. 1, reference numeral 1 is a case of a vehicle instrument device for accommodating instrument bodies such as a speedometer and a tachometer (not shown).
A lamp box 2 made of a synthetic resin material, such as polypropylene, having a substantially T-shaped plan view is housed therein for displaying the operating states and alarm states of various vehicle devices, for example, gear positions of the vehicle. Inside the lamp box 2, a plurality of lighting chambers 3 are defined by partition walls 4,
An insertion hole 6 for an illumination lamp 5 is formed in the bottom of each illumination chamber 3, and a display lens 7 is fitted in the front opening of each illumination chamber 3. In addition, first and second storage chambers 8 and 9 for storing first and second substrates, which will be described later, respectively, are formed in a substantially T shape on the rear surface side and one side in the longitudinal direction of the illumination chamber 3, The peripheral wall 8A of the storage chamber 8 is provided with a stepped portion 10 and a first holding portion 11 formed of a pair of elastic claw pieces extending rearward from the stepped portion 10, and a second storage chamber 9 having one surface open. A pair of groove portions 12 are formed on the opposing wall 9A, and a second holding portion 13 composed of a pair of elastic claw pieces is provided on the upper end wall 9B of the groove portion 12. Further, the left and right outer portions of the first storage chamber 8 project laterally and have positioning holes.
14 are provided, and engaging claw portions 15 projecting outward are respectively provided on the left and right outer side portions of the first storage chamber 8 and the left and right outer side portions in the longitudinal direction of the second storage chamber 9. .

Reference numeral 16 is a first board on which the respective illumination lamps 5 are mounted.
A second board 18 on which a large number of electronic components 17 and connectors 17A for connecting to external connectors (not shown) are mounted is arranged in a direction intersecting with the board 16 of FIG. Substrates 16 and 18 are, for example, an FPC plate formed by etching a copper foil or printing carbon on a resin sheet such as polyester, a heat sheet or an electric wire coated with vinyl chloride, etc. It is electrically connected by a flexible thin plate-shaped wiring member 19 such as a flat lead. Then, the first and second substrates 16 and 18 are inserted into the first and second storage chambers 8 and 9, respectively, and the front surface peripheral edge of the first substrate 16 is provided in the first storage chamber 8. The first substrate 11 is brought into contact with the second holding member 11 and the rear surface of the second substrate is locked.
Insert both side edges of 18 into the groove 12 provided in the second storage chamber,
Further, by locking the locking groove portion 13A provided on the second substrate 18 to the second holding portion 13, the first and second substrates 1
6 and 18 are temporarily fixed and held in the first and second storage chambers 8 and 9 formed in the lamp box 2 in the intersecting direction in a positioned state. In this case, the plurality of illumination lamps 5 mounted on the first substrate 16 are inserted and arranged in the respective illumination chambers 3 through the insertion holes 6, and from the second storage chamber 9 on the lower end side of the second substrate 18. It is arranged so as to project downward.

Further, the bottom wall 1A of the case 1 is provided with a positioning pin 20 and an engagement receiving portion 21 corresponding to the positioning hole 14 and the coupling claw portion 15 formed in the lamp box 2, respectively, and the first board 16 Abut boss 22 that abuts the rear surface
Is projected. Further, the bottom wall 1A is formed with a recessed portion 23 in which the second substrate 18 projecting downward from the lower end portion of the second storage chamber 9 is arranged, and a wall facing the recessed portion 23 in the longitudinal direction. A pair of groove portions 24 into which both side edge portions of the second substrate 18 are inserted are formed so as to face each other. When the lamp box 2 is inserted into the case 1 with the second board 18 preceding the groove 24, the groove 24 contacts the lower end of the second board 18 and guides the lower end into the groove 24. A guide inclined portion 25 is provided so as to connect the upper end of the groove portion 24 and the peripheral wall 1B of the case 1 to each other.

Then, the first and second substrates 16 and 18 are attached to the lamp box 2.
The lower end of the second board 18 is fitted into the groove 24 along the guide inclined portion 25 in a state in which the second board 18 is temporarily fixed and held, and the second board 18 is inserted along the groove 24 to insert the lamp box 2 into the lamp box 2. Is inserted into the case 1, the positioning hole 14 provided in the lamp box 2 is fitted into the positioning pin 20 provided in the case 1,
Moreover, the engaging claw portion 15 of the lamp box 2 and the engaging receiving portion 21 of the case 1 are engaged with each other, and the lamp box 2 is assembled and fixed to the case 1 in a positioned state.

In this way, when the lamp box 2 is integrally assembled in the case 1, the first substrate 16 temporarily held in the first storage chamber 8 of the lamp box 2 via the first holding portion 11 becomes The stepped groove 10 formed in the first storage chamber 8 and the butting boss portion 22 formed in the bottom wall 1A of the case 1 are sandwiched and fixed, and the second holding portion 13 is provided in the second storage chamber 9. The second substrate 18, which is temporarily fixed and held, is sandwiched and fixed between the recessed portion 23 formed in the bottom wall 1A and the second storage chamber 9.

Therefore, in the substrate mounting apparatus of the present invention, the first and second independent substrates 1 and 2 arranged in the first and second storage chambers 8 and 9 formed in the lamp box 2 in a direction intersecting with each other.
6 and 18 are temporarily fixed and held via the holding portions 11 and 13, respectively. In this state, the lamp box 2 is attached and fixed to the case 1, and the lamp box 2 and the case 1 make the first and second substrates 16 respectively. , 18 are respectively sandwiched and fixed, there is no need to form insertion holes in the first and second substrates 16, 18 for integrally assembling them, as in the conventional example. In addition, the pattern on the board can be freely selected, there is no fear that the wiring space will be reduced, and since both boards 16 and 18 are integrated through the lamp box 2, the number of parts does not increase. Moreover, since the first and second boards 16 and 18 that intersect with each other are independently assembled to the lamp box 2, the first board 16 on which the plurality of illuminating lamps 5 are mounted is installed in each of the lighting chambers of the lamp box 2. When assembled in the first storage chamber 8 formed at the rear of the lighting chamber 3, the lighting lamp 5 and the insertion hole 6 formed at the bottom of each lighting chamber 3 can be easily aligned, and the first substrate 16 is mounted. The work can be performed easily and quickly, and an assembling error between the substrates 16 and 18 does not occur during the assembling work, and it becomes difficult to apply an unreasonable stress to the illuminating lamp 5, and the illuminating lamp 5 and the first substrate 16 The electrical connection with can be kept stable.

Further, in this embodiment, the lower end portion of the second substrate 18 extends below the lamp box 2, but since the space behind the first substrate 16 is small, a plurality of sheets can be provided as in the conventional example. Case 1 compared to the case where the substrates are arranged in parallel.
There is also an additional effect that the space inside can be effectively used. Of course, if the second substrate 18 does not project to the rear of the lamp box, further reduction in thickness can be achieved.

The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. For example, the case and the lamp box are engaged claws and engaged receivers. Although the one fixed by connecting with the part is shown, both may be fixed by screwing, and the fixing means may be appropriately selected. Further, the number of boards is not limited to a combination of two boards, and even if the number of boards is three or more, the present invention can be applied to a mounting device for at least two boards.

[Effect of device]

The present invention provides a lamp box in which a plurality of lighting chambers are defined, and a plurality of lighting lamps inserted and arranged in the lighting chamber,
A first board on which these illuminating lamps are mounted and arranged, a second board arranged in a direction intersecting with the first board, and the lamp box are formed, and each of the boards is independently formed in the lamp box. Since it has a holding portion for temporarily fixing the lamp box in a crossed state and a case for accommodating and fixing each of the lamp boxes inside the lamp box, the wiring space of the board is effectively used. In addition, the board can be held via the lamp box and the lighting lamp and lighting room can be easily aligned, so the board mounting work can be simplified and the electrical connection between the board and the lighting lamp can be stable at the same time. It is possible to provide a mounting device for a substrate which can be kept at.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, FIG. 1 is a cross-sectional view, FIG. 2 is a perspective view of an essential part in a state where a case and a lamp box are disassembled, and FIG. 3 is a lamp box. FIG. 4 is a partially cutaway plan view of the essential part of the state where the first substrate and the second substrate are disassembled. 1 ... Case, 2 ... Lamp box 3 ... Lighting room, 5 ... Illumination lamp 11 ... First holding part, 13 ... Second holding part 16 ... First substrate, 18 ... 2 substrates

Claims (1)

[Scope of utility model registration request] 1. A lamp box in which a plurality of illumination chambers are defined, a plurality of illumination lamps inserted and arranged in the illumination chamber, a first board on which the illumination lamps are mounted and arranged, and the first board. A second substrate arranged in the lamp box in the intersecting direction, a holding portion formed in the lamp box, and temporarily holding each of the substrates in the lamp box independently in the intersecting state; A mounting device for a substrate, comprising: a case that is housed and that clamps and fixes each substrate between the lamp box and the lamp box.