JPH08222188A - Board fitting bulb - Google Patents

Abstract

PURPOSE: To erect a pawl fitting boss coaxially with a barrel section on the face of a flange section on the opposite side to the barrel section, provide a bayonet pawl on the outer diameter of the pawl fitting boss, form a hexagon screw head section on at least part of the outer diameter of the barrel section of a board fitting bulb, and form a printed board on one face. CONSTITUTION: A nearly cylindrical pawl fitting boss 8 is provided on the face of the flange section 5 of a board fitting bulb 1 on the opposite side to a barrel section 4, and the boss 8 is formed into a nearly cylindrical shape coaxial with the barrel section 4. A bayonet pawl 6 is provided on the outer diameter of the boss 8. The lower face 5c of the flange section 5 is kept in contact with a printed board 10 on the side of the pawl fitting boss 8. The screw head section of a hexagon bolt or a hexagon screw head section 9 having the same shape as the outer diameter of a hexagon nut is provided on the outer diameter side of the barrel section 4. The head section 9 has the size to be coupled with a tool used for fitting or removing the bulb 1 to or from the printed board 10, and the printed board 10 is provided on one face.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a board mounting light bulb which can be detachably mounted on a printed circuit board by combining a socket with a baseless light bulb such as a microminiature light bulb. An object of the present invention is to provide a board mounting light bulb adapted to the recent process of assembling a printed circuit board in which a mold circuit component is adopted.

[0002]

2. Description of the Related Art An example of a conventional board mounting light bulb 90 of this type is, for example, Jpn.
There is one disclosed in Japanese Patent No. 11029, and as shown in FIGS. 5 and 6, this substrate mounting light bulb 90 includes a baseless light bulb 91 such as a microminiature light bulb and a socket 92 formed of a resin member or the like. The socket 92 is composed of a body portion 93, a flange portion 94 and a bayonet claw 95.

The body portion 93 is formed in a substantially cylindrical shape having a bottom with a light bulb mounting hole 93a for holding the baseless electric bulb 91 provided at the center of the body portion 93a. A flange portion 94 is provided at an end portion on the bottomed side, and a bayonet claw 95 is provided so as to project to the outer periphery of the body portion 93.

When mounting the board mounting light bulb 90 having the above structure on the printed circuit board 80, first, the board mounting light bulb 90 is inserted into the mounting hole 81 provided in the printed circuit board 80 from the back surface 80b side, When the flange portion 94 and the back surface 80b come into contact with each other, for example, if the board mounting light bulb 90 is rotated in the clockwise direction, the flange portion 94 and the bayonet claw 95 sandwich the printed board 80, and the mounting work is completed. It will be done.

At this time, a winding portion 94a is formed on the flange portion 94 by providing a slit or the like, and the lead wire 91a of the baseless bulb 91 is wound around to form the electrode portion 9a.
6 is formed, the electrode portion 96 comes into contact with the power distribution portion 82 formed on the back surface 80b of the printed circuit board 80 to electrically connect to the board mounting light bulb 90, thereby enabling lighting. Becomes

The board mounting light bulb 90, which is mounted on the printed circuit board 80 as described above, is rotated counterclockwise, for example, so that the printed circuit board is formed by the flange portion 94 and the bayonet claws 95. The pinch to 80 is released, and in that state, it can be removed by pulling out in the direction of the back surface 80b. Therefore, the board mounting bulb 90
It can be freely attached and detached in case of replacement in case of wire breakage.

[0007]

Considering the process of assembling the printed circuit board 80 as a whole, it has been considered that circuit components such as transistors, capacitors, and resistors have lead wires. The lead wire is passed through a hole provided in the printed circuit board 80 to temporarily attach the components, and then the printed pattern provided on the back surface 80b side of the printed circuit board 80 is soldered to be attached. Therefore, the print pattern and the power distribution unit 82 are both on the back surface 80b side of the printed circuit board 80.

However, recently, as the above-mentioned circuit component, a chip-type or surface-mounting type having no lead wire is often adopted,
Along with this, in many cases, a printed pattern for mounting the above-described circuit component is provided on the front surface 80a side of the printed circuit board 80. Therefore, in the recent printed circuit board 80, it is necessary to lay a copper foil on the back surface 80b only to form the power distribution section 82, and the printed circuit board 8
There is a problem in that 0 is double-sided and the cost is significantly increased.

Further, since the board mounting light bulb 90 is configured to be attached and detached from the back surface side of the printed circuit board 80, the board mounting light bulb 90 when the display 61 is formed on the panel 60 as shown in FIG. Replacement work to deal with disconnection is
Removal of lens 62 → removal of substrate 80 → replacement of bulb 90 for mounting the substrate → mounting of substrate 80 → lens 6
The number of steps is 2 and the number of man-hours is large, which is very complicated, and there is a problem that maintenance is inferior. Therefore, it is a problem to solve these points.

[0010]

The present invention is, as a concrete means for solving the above-mentioned conventional problems, a substantially cylindrical shape having a light bulb mounting hole having a bottom surface for holding a baseless bulb. A flange portion is provided on the bottom surface side of the body portion of the, and the winding portion of the lead wire of the baseless electric bulb is provided on the flange portion to be a terminal portion, and the flange portion and the bayonet claw are provided on the printed circuit board. In a board mounting light bulb that is sandwiched for mounting and electrical connection, a claw mounting boss is provided coaxially with the body on a surface of the flange opposite to the body. A bayonet mounting light bulb, wherein the bayonet claw is provided on the outer diameter of the claw mounting boss, and a hexagonal screw head portion is formed on at least a part of the outer diameter of the body portion. This is to solve the problem.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail based on an embodiment shown in the drawings. Reference numeral 1 in FIGS. 1 and 2 is a board mounting light bulb according to the present invention. The board mounting light bulb 1 is composed of a baseless bulb 2 and a socket 3.
The socket 3 has a substantially cylindrical body portion 4 provided with a light bulb attachment hole 4a having a bottom surface for holding the baseless bulb 2 at the center in the axial direction, and a bottom surface of the light bulb attachment hole 4a of the body portion 4. It is similar to the conventional example in that it is composed of a flange portion 5 provided at an end portion on one side and a bayonet claw 6.

A winding portion 5a is formed on the flange portion 5 by a slit or the like, a lead wire 2a of the baseless bulb 2 is wound to form a terminal portion 7, and the board mounting bulb 1 and the printed board 1 are printed. It is similar to the conventional example in that it is electrically connected to the substrate 10.

Here, in the board mounting light bulb 1 of the present invention,
A substantially cylindrical pawl mounting boss 8 is provided on the surface of the flange portion 5 opposite to the side in contact with the body portion 4, that is, the lower surface 5c. It is formed as a substantially cylindrical shape coaxial with the body portion 4, and
It has a shape as if the body portion 4 extends through the flange portion 5.

The bayonet claw 6 is provided on the outer diameter of the claw mounting boss 8 formed as described above. Therefore, as described above, the board mounting light bulb 1 is sandwiched between the flange 5 and the bayonet claws 6 on the printed board 10. Therefore, in the board mounting light bulb 1 of the present invention, When mounting on the substrate 10, the mounting hole 1 is attached from the surface 5b side of the substrate 10.
Insertion into 1.

As described above, the mounting hole 11 is provided from the surface 5b side.
However, in the conventional example, the flange portion 5 is in contact with the rear surface 10b of the printed circuit board 10 on the surface on the body portion 4 side, that is, the upper surface 5b in the conventional example. In the board mounting light bulb 1 of the present invention, the flange portion 5 comes into contact with the surface 10a of the printed circuit board 10 at the lower surface 5c which is the claw mounting boss 8 side.

Accordingly, the terminal portion 7 has a shape suitable for electrical contact when the conventional example is in contact with the printed circuit board 10 on the upper surface 5b of the flange portion 5, whereas the lead wire is formed. Proper changes such as projecting 2a to the lower surface 5c side which is the claw mounting boss 8 side are made to ensure the electrical connection when the lower surface 5c of the flange portion 5 contacts the printed circuit board 10. .

In addition to the above, on the outer diameter side of the body portion 4 according to the present invention, a screw head portion of a hexagonal bolt or a hexagonal screw head portion 9 having the same shape as the outer diameter of a hexagonal nut is provided. At this time, the hexagonal screw head-shaped portion 9 does not need to be provided over the entire length of the outer diameter of the body portion 4 in the axial direction, and for mounting the substrate on the pudding and the plate 10, which will be described later. The size may be sufficient to fit a tool used for mounting and removing the light bulb 1.

At this time, the dimensions of the hexagonal screw head-shaped portion 9, particularly the dimensions of the regular hexagonal portion are defined by JIS standard, I
It is preferable to set the dimensions that are specified as the screw head or hexagon nut in the SO standard, etc. By setting in this way, for example, existing tools that are widely marketed for screws such as box drivers and hexagon wrenches. But,
Mounting the board mounting light bulb 1 on the printed circuit board 10;
It can be used as a tool for removal.

Further, when the tool is attached and detached by using a tool such as the hexagon wrench, the tool comes into contact with the upper surface 5b of the flange portion 5 and the lead wire 2a wound around the winding portion 5a. Since it may cause looseness,
As shown in FIG. 3, a wire holding portion 5d formed by a groove or the like is formed at an appropriate position of the winding portion 5a, and the tip of the lead wire 2a is fitted and fixed to withstand a slight contact of a tool. It is preferable that

Next, the operation and effect of the board mounting light bulb 1 of the present invention having the above-mentioned structure will be described. First of all, as described above, the flange portion 5 is configured to come into contact with the surface 10a of the printed circuit board 10 on the lower surface 5c, so that the printed circuit board 10 is connected to the board mounting light bulb 1 via the terminal portion 5a. Is to be supplied from the surface 10a side.

Therefore, the bulb mounting hole 1 of the printed circuit board 10
The power distribution unit 12 provided on the peripheral edge of 1 is provided on the front surface 10b side, and thus, in the recent printed circuit board 10 in which the chip type circuit component is adopted and the print pattern is formed on the front surface 10a side, Power distribution unit 12
Also becomes the same surface, and the printed circuit board 10 can be single-sided, and the configuration is simplified.

Secondly, the panel 2 as shown in FIG.
In the usage state of the board mounting light bulb 1, such as when the display 21 is formed by using the board mounting light bulb 1 of the present invention, the lens 22 is used when the board mounting light bulb 1 is broken. The surface 10a of the printed circuit board 10 can be simply removed.
Since it can be replaced immediately from the side, the number of work steps is reduced and the maintainability is improved.

In the above description, the main part of the present invention has been mainly described, but in actual implementation, for example, it is assumed that a color cap is attached to the baseless bulb 2 to obtain a desired colored light. Alternatively, it goes without saying that it is possible to provide an appropriate position, an appropriate number of holes, grooves, etc. for routing the lead wire 2a of the baseless bulb 2 when forming the terminal portion 5a. .

[0024]

As described above, according to the present invention, the claw mounting boss is provided coaxially with the body on the surface of the flange portion opposite to the body, and the outer diameter of the claw mounting boss is increased. A bayonet claw is provided on the base plate, and a hexagonal screw head-shaped part is formed on at least a part of the outer diameter of the body part so that the surface of the flange part opposite to the body part is printed. It is possible to form a power distribution unit for the board mounting light bulb on the surface of the printed circuit board so as to contact the board.

As a result, the chip type circuit component is adopted, and it becomes possible to form the power distribution portion on the same surface with respect to the recent printed circuit board on which the print pattern is formed on the front surface side. By eliminating the need for double-sided printing, it is extremely effective in reducing the cost of equipment that employs a printed circuit board and this type of board mounting light bulb.

With the above structure, the board mounting light bulb can be inserted from the front surface side of the printed circuit board, and the board mounting light bulb is used in a state in which an indicator or the like is formed using the board mounting light bulb. When it is necessary to replace the lens, the lens can be replaced by simply opening the front surface such as removing the lens, and the number of man-hours required for the replacement can be reduced and the maintainability can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a board mounting light bulb according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

3 is a cross-sectional view taken along the line BB of FIG.

FIG. 4 is a cross-sectional view showing an example of a use state of the board mounting light bulb of the present invention.

FIG. 5 is a perspective view showing a conventional example.

6 is a sectional view taken along the line CC of FIG.

FIG. 7 is a cross-sectional view showing an example of a usage state of a conventional board mounting light bulb.

[Explanation of symbols]

1 ... Board mounting light bulb 2 ... Baseless light bulb 2a ... Lead wire 3 ... Socket 4 ... Body part 4a ... Light bulb mounting hole 5 ... Flange part 5a ... Winding part, 5b ... Top surface, 5c ... bottom surface, 5d ...
… Wire holding part 6 …… Bayonet claw 7 …… Terminal part 8 …… Claw mounting boss 9 …… Hexagon screw head part 10 …… Printed board 11 …… Mounting hole 12 …… Power distribution part 20 …… Panel 21… … Indicator 22 …… Lens

Claims (2)

[Claims] 1. A flange portion is provided on the bottom surface side of a substantially cylindrical body portion in which a light bulb mounting hole having a bottom surface for holding a baseless bulb is provided, and the flange portion is provided with a flange portion of the baseless bulb. A lead wire winding portion is provided to serve as a terminal portion, and in a board mounting light bulb that is mounted and electrically connected by being sandwiched between the flange portion and a bayonet claw on a printed circuit board, the flange portion is A claw mounting boss is provided coaxially with the body on the surface opposite to the body, the bayonet claw is provided on the outer diameter of the claw mounting boss, and at least the outer diameter of the body is provided. A board mounting light bulb characterized in that a hexagonal screw head portion is formed in part. 2. The board mounting device according to claim 1, wherein the winding portion is provided with a wire holding portion for fixing a tip of the lead wire wound around the winding portion. Light bulb.