JPS5827514Y2 - Light emitting element holding device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a new light emitting element holding device, in particular, which allows the light emitting element to be replaced quickly and reliably from the front of the device, and which also makes it possible to reduce manufacturing and maintenance costs. The present invention aims to provide a novel light emitting element holding device.

2. Description of the Related Art In general, many light emitting elements such as small light bulbs, neon tubes, and light emitting diodes are used in mechanical devices, electrical devices, and electronic devices to display and illuminate their operations.

These often have to be replaced because they break due to their lifespan or due to manufacturing defects.

Therefore, it is desirable that the holding device for attaching the light emitting element to the device housing be capable of quickly and reliably replacing the light emitting element, and that the cost required for replacement is low and the manufacturing cost is also low. .

Particularly when the device is used in a narrow space such as the cockpit of an aircraft, or when a large number of different types of light emitting elements are used such as in a computer, the difficulty of replacement work and the unit cost of replacement parts may be affected by maintenance work. This has a non-negligible impact on economic efficiency.

By the way, when considering conventional light emitting element holding devices, one that relatively meets the above requirements is that, for example, the socket that holds the lamp is fixed to the device casing with screws and nuts, and the attachment part is Some had a structure that allowed them to be removed from the front side of the device case.

Although this type of device allows the light emitting element to be replaced from the front of the device, it is not always useful in actual maintenance situations.

This is because, apart from when used in power equipment or large machinery, it is generally desirable for these holding devices to be small, and the light emitting elements used in these devices are also becoming smaller. This is because a special tool having a tweezers shape or a soft resin cylinder attached to the tip is required, and even if these tools are used, the task of replacing the tool is extremely difficult.

Particularly when the light-emitting element is a miniature light bulb, the cap and socket are often tightly screwed together, and when trying to pull it out, too much force is applied, sometimes breaking the glass part.

If this happens, the cap remains in the socket and cannot be removed, which may require the device to stop operating and the entire holding device to be replaced.

Furthermore, since the structure of the holding device is complex and uses many parts such as rackets and screws, it cannot be denied that the manufacturing cost increases accordingly.

The present invention was made to solve these problems, and includes a recess that opens toward the front of the device, a pin terminal that penetrates the bottom of the recess and protrudes into the recess,
It consists of a holder made of a slightly elastic insulator and having a hole into which the pin terminal is press-fitted, and a cylindrical body containing a light emitting element and having a lid on its head. Several engagement holes are drilled through the cylindrical body from front to back, and a retaining piece is integrally or integrally formed at a position corresponding to the engagement hole of the holder on the rear end surface of the cylinder. The cylindrical body is engaged with the cylindrical body by a pin terminal that is press-fitted into the press-fitting hole while holding a connection conductor to the light-emitting element between the press-fitting hole and the inner surface of the press-fitting hole. The combined holder is held within the recessed portion, and the light emitting element and the light emitting element driving circuit are connected to each other.

The details of the light emitting element holding device of the present invention will be explained below according to illustrated embodiments applied to a display device.

1 in the figure is a frame-shaped case, the back of which is a light-shielding insulator,
It is closed by a back plate 2 made of, for example, synthetic resin, and a light guide plate 3 and a display plate 4 are arranged in that order on the front side.

The light guide plate 3 and the display plate 4 are each made of a transparent material, for example, acrylic resin, and the display plate 4 has display bodies 5.5 such as characters formed in a light-transmissive manner.

That is, a light-shielding film 6 is provided on the surface of the display panel 4 except for the portions that will become the display bodies 5, 5, thereby forming a light-transmitting display body 5.5.

Note that the display bodies 5, 5 may be formed on the back surface of the display board 4 instead of on the front surface.

A reflective portion consisting of a large number of conical stipples 7, 7 is formed on the back surface of the light guide plate 3 at positions corresponding to the display bodies 5, 5.

Therefore, the light introduced into the wall thickness of the light guide plate 3 is
, 7 and transmitted through the display bodies 5, 5, and as a result, when viewed from the front of the display panel 4, the display bodies 5, 5 appear bright.

Reference numeral 8 denotes a concave portion, which is composed of a concave portion 9 integrally formed in the back plate, a through hole 10 provided in the light guide plate 3, and a through hole 11 provided in the display plate, and is directed toward the front of the display device. It's open.

Reference numeral 12.12 is a pin terminal made of a conductive material, which penetrates the bottom of the recess 9, projects into the recess 8, and is fixed to the through-hole with adhesive or the like.

Reference numeral 13 denotes a baseless metal bulb as a light emitting element, and 14 and 14 are connected to the filament 15 by external lead wires as connection conductors, and are led out through the crushed base 16.

A holder 17 is made of a slightly elastic insulator, such as a soft synthetic resin.

A holding hole 18 that opens toward the front is provided in the center of the holding body 17.

The holding hole 18 has an inner diameter slightly smaller than the outer diameter of the capless light bulb 13, and its depth is such that the capless light bulb 13 held therein does not move freely.

Reference numeral 19 denotes a retaining wall, which integrally protrudes forward from the opening edge of the retaining hole 18, and due to the existence of this retaining wall 19, the substantial depth of the retaining hole 18 extends to the front end of the retaining wall 19. It happens.

By providing such a retaining wall 19, the retainer 17
The depth of the holding hole 18 can be increased without increasing the wall thickness, and it is also possible to impart greater elasticity to the holding hole 18.

20. Reference numeral 20 denotes a pin terminal press-fit hole, which is provided so as to communicate between the back surface of the holding body 17 and the bottom surface of the holding hole 18.

The inner diameter thereof is made slightly smaller than the outer diameter of the pin terminal so that the pin terminal 12, 12 can be press-fitted with an appropriate force.

Reference numeral 21 denotes a cylindrical body, one end of which is provided with engaging legs 22, 22 and auxiliary legs 23, 23 integrally with the cylindrical body 21, and the other end of which is provided with a lid 24.

The cylindrical body 21 is made of a transparent material, such as acrylic resin, and may be colored if necessary to form the cylindrical body 2.
1 can function as a color filter.

The cylindrical body 21 has an inner diameter of such a size as to leave an appropriate space around the baseless light bulb 13, and a length of the cylindrical body 21, which will be described later when the light emitting element holding device of the present invention is assembled.
It is formed in such a size that the back surface of the display panel 5 comes into contact with the front surface of the display board 4.

The lid body 24 is made of opaque synthetic resin, and has a lid part 25 and a knob part 26 formed integrally.

The lid portion 25 has a substantially truncated conical shape, and integral ribs 27, 27, 27, 27 are provided radially on the outer surface thereof.

If the lid 24 is made of transparent or translucent synthetic resin, the lid 24 itself will shine, allowing the light emitting element holding device of the present invention to be used as an indicator light.

The engaging legs 22.22 are integrally provided rearwardly projecting from locations approximately 180 degrees apart on the rear end surface of the cylinder body 21, the length of which is slightly larger than the thickness of the holding body 17, and a A spherical portion 28.28 having a diameter slightly larger than the outer diameter of the engaging leg 22.22 is integrally provided.

Reference numeral 29.29 is an engagement hole, which is provided through the holding body 17 in the front and rear directions corresponding to the engagement legs 22.22, and its inner diameter is formed to be approximately the same as the outer diameter of the engagement legs 22, 22. has been done.

The auxiliary legs 23.23 are the engagement legs 22, 2 on the rear end surface of the cylinder body 21.
The holding body 17 is provided with fitting recesses 30, 30 that are open toward the front. .

Note that 31 is a connector that electrically connects a light emitting element drive circuit (not shown) to the pin terminals 12 and 12.

Therefore, in the light emitting element holding device as described above, the baseless metal light bulb 13 is inserted into the holding hole 18 while passing its external lead wire 14.14 through the pin terminal press-fit hole 20.20, and the baseless metal light bulb The cylinder body 21 is engaged with the holding body 17 while enclosing the cylinder body 13 therein.

The holding body 17 and the cylindrical body 21 are engaged by the engagement legs 22, 22 being press-fitted into the engagement holes 29, 29, and at the same time, the auxiliary legs 23.23 are fitted into the fitting insertion recesses 30.30. This prevents the two engaged legs from swinging about the line connecting the engagement legs 22,22.

Furthermore, when the engaging legs 22.22 are press-fitted into the engaging holes 29, 29, the spherical portions 28.28 of the engaging legs expand the engaging holes 29.29 slightly and protrude through the rear surface.

Since the spherical portions 28 and 28 protruding toward the back surface of the holding body 17 are engaged with the back side peripheral edges of the engagement holes 29 and 29, the engagement between the cylinder body 21 and the holding body 17 is released. Requires greater force.

The holding body 17 that has engaged the cylindrical body 21 is held in the concave portion 8 by being press-fitted into the pin terminal press-fit holes 20, 20, but as described above, the pin terminal press-fit holes 20, 20 are Since the lead wire 14.14 is inserted, the pin terminal 12.12 is held between the inner surface of the pin terminal press-fit hole 20.20, and the filament 15 of the baseless metal bulb 13 is inserted into the external lead wire 14.゜14 pin etc. 12.
12 and a connector 32, it is electrically connected to a light emitting element drive circuit (not shown).

Also, at this time, the lid portion 25 provided on the cylinder body 21 is connected to the concave portion 8.
This will cover the front opening of the

When replacing the baseless light bulb 13, the cylindrical body 21
After pulling out the holding body 17 engaged with the holding body 17 forward,
All you have to do is to release the connection between the two, replace the baseless bulb 13, and install it again as described above.

As described above, in the light emitting element holding device of the present invention, a recess that opens toward the front is provided in the outer box or panel of the device to which the device is applied, and this recess is provided on the bottom of the recess. A pin terminal that penetrates and projects into the recess is fixed, and when the pin terminal is press-fitted into a press-fit hole provided in the holder, the holder and the light-emitting element are enclosed in the holder and the light-emitting element is inserted into the holder. The structure is such that the engaged cylinder is held in the recessed part, and at the same time the pin terminal clamps the connection conductor to the light emitting element between it and the inner surface of the press-fit hole, which makes the light emitting element more stable than conventional ones. can be easily and quickly replaced from the front of the device, and since the structure is such that only the light emitting element needs to be replaced, maintenance costs can be reduced.

Furthermore, since the structure is extremely simple compared to conventional ones, the manufacturing cost of the holding device can be lowered.

FIG. 4 shows another embodiment of the light emitting element holding device of the present invention, in which numeral 32 is a cylindrical body formed as a lamp reflector and opened toward the front.

Reference numeral 33 denotes a lid, which is formed into a disk shape using transparent or semi-transparent resin, and warning characters 34 are formed on the surface thereof in a light-transmitting manner.

Reference numeral 35 denotes a concave portion which is open toward the front and has a shape in which the cylindrical body can be received.

The light emitted from the baseless metal bulb 13 is reflected to the front side by the lamp reflector, resulting in a bright and easy-to-see warning display light-emitting element holding device even though the baseless metal bulb with a small amount of light is used.

[Brief explanation of drawings]

1 to 3 show an example of the implementation of the light emitting element holding device of the present invention, in which FIG. 1 is a plan view thereof, FIG. FIG. 3 is an exploded perspective view of the main parts, and FIG. 4 is a vertical sectional view showing the main parts of another embodiment. Explanation of symbols 8... Concavity, 12...
Pin terminal, 13... Light emitting element, 14...
・Connection conductor, 17...Holding body, 20...
・Bin terminal press-fit hole, 21... Cylindrical body, 22...
...Engagement piece, 29...Engagement hole, 25...
...Lid.

Claims (1)

[Scope of utility model registration request] A holder having a recess opening toward the front of the device, a pin terminal penetrating the bottom surface of the recess and protruding into the recess, and a hole formed of a slightly elastic insulator into which the pin terminal is press-fitted. The holding body has several engaging holes penetrating through it in the front and back, and the holding body has several engagement holes penetrating through it at the front and back. An engagement piece is formed integrally or integrally with the rear end surface of the body at a position corresponding to the retaining hole of the holder, so that the holder and the cylindrical body can engage with each other. By the pin terminal that is press-fitted into the press-fit hole while holding the connection conductor to the light-emitting element between the press-fit hole and the inner surface of the press-fit hole, the holder that is engaged with the cylindrical body is held in the recessed part, and the light-emitting element and the light-emitting element are A light emitting element holding device characterized in that it is connected to a drive circuit.