CN213634061U

CN213634061U - LED backlight source suitable for ear thermometer display screen

Info

Publication number: CN213634061U
Application number: CN202022977262.7U
Authority: CN
Inventors: 齐振伟
Original assignee: Hangzhou Shengrui Photoelectric Technology Co ltd
Current assignee: Hangzhou Shengrui Photoelectric Technology Co ltd
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-07-06
Anticipated expiration: 2030-12-14

Abstract

The utility model relates to a backlight field specifically is a be applicable to LED backlight for ear thermometer display screen, including the PCB board, the inboard swing joint of PCB board has a plurality of LED lamps of group, and a plurality of group the LED lamp is rectangular form distribution in the inboard of PCB board, the lower extreme fixedly connected with limiting plate of PCB board, the utility model relates to a be applicable to LED backlight for ear thermometer display screen, through the screw rod fixed mode of limiting plate with the PCB board, make the limiting plate for PCB board convenient to detach, when the limiting plate lid is on the PCB board, provide the sufficient stability of LED lamp to when puting aside at the limiting plate simultaneously, make simple fixed LED lamp expose, thereby the user carries out independent change to the LED lamp that destroys.

Description

LED backlight source suitable for ear thermometer display screen

Technical Field

The utility model relates to a backlight field specifically is a be applicable to ear temperature rifle LED backlight for display screen.

Background

The backlight source is a light source positioned at the back of the liquid crystal display, the lighting effect of the backlight source directly influences the visual effect of the liquid crystal display module, the liquid crystal does not emit light, and the displayed figures or characters are the result of light modulation. The liquid crystal display is a passive light-emitting element, the display screen does not emit light, but is illuminated by a backlight system below the display screen, and the backlight source and the liquid crystal display screen are combined to form a liquid crystal display module. The liquid crystal backlight is a planar uniform lighting device, and cold cathode fluorescent lamps or LED lamp strips serving as light sources are arranged on two sides or one side of the whole backlight source. The cold cathode fluorescent lamp is a linear light source, the LED is a point light source, a light guide plate is needed for converting the light source into a surface light source, the light guide plate is generally made of acrylic plastic with high light transmittance, the surface is very smooth and flat, so that most of internal light rays can be regularly and totally reflected on the flat surface, but not to be emitted to the outside of the light guide plate, the bottom of the light guide plate of the liquid crystal display is printed with white lattice points, the light rays are not regularly reflected totally but emitted to the upper part of the light guide plate at the positions of the light guide plate printed with the mesh points, the quantity of the light rays emitted by the light guide plate at the positions can be controlled by controlling the density of the mesh points at each position, the light rays incident from two sides can be uniformly spread on the whole plane by the precisely designed mesh points of the light guide plate, optical films are arranged above the light guide plate, the optical films play a role in uniform light rays and converge large-angle light for frontal observation and the like.

Traditional LED backlight mainly comprises PCB base plate and LED bulb, and the mode of common LED backlight manufacturing is to install a plurality of LEDs etc. at the PCB board, passes through bolt or glue with a plurality of PCB boards again and installs on the base, and this kind of mounting means is inconvenient, has reduced work efficiency, and is not convenient for maintain single PCB board, for this reason, we have provided one kind and have been applicable to LED backlight for ear thermometer display screen.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a be applicable to ear temperature rifle LED backlight for display screen to solve the problem that proposes among the above-mentioned background art.

For realizing above-mentioned purpose, a be applicable to ear temperature rifle LED backlight for display screen, including the PCB board, the inboard swing joint of PCB board has a plurality of LED lamps of group, and a plurality of groups the LED lamp is the rectangle in the inboard of PCB board and distributes, the lower extreme fixedly connected with limiting plate of PCB board.

Preferably: the PCB board includes the lamp hole, the lamp hole runs through the inboard of seting up in the PCB board, the lower extreme of PCB board is located the both sides in lamp hole and has seted up the absorption groove, the inboard surface in lamp hole is provided with positioning mechanism, the position that the PCB board lower extreme is close to the four corners has seted up the screw hole, the inside of PCB board still is provided with magnetite A.

Preferably: the LED lamp comprises a shell, the outer surface of the shell is connected with two sets of adsorption blocks in an axial symmetry mode, the inner side, close to the top, of each adsorption block is provided with a magnet B, the outer surface of the shell is further provided with two sets of positioning holes in an axial symmetry mode, and the LED lamp is connected with a PCB board in a movable mode through the embedding of the positioning mechanisms and the positioning holes.

Preferably: the limiting plate further comprises a soft connection layer, the soft connection layer is fixedly connected to the upper end of the limiting plate, the distribution state of the soft connection layer corresponds to the distribution state of the LED lamps, and the limiting plate is fixedly connected with the PCB through threaded holes.

Preferably: the positioning mechanism is composed of a spring and a semicircular elastic pin, one end of the spring is connected to the elastic pin, the other end of the spring is connected to the inner wall of the PCB, the elastic pin is elastically connected with the inner wall of the PCB through the spring, and the outer diameter size of the elastic pin is matched with the inner diameter size of the positioning hole.

Preferably: the soft connecting layer is made of rubber, the soft connecting layer is circular, and the size of the soft connecting layer is larger than that of the lower end of the LED lamp.

Preferably: the inner side of the LED lamp is also provided with a light emitting diode.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model relates to a be applicable to ear temperature rifle LED backlight for display screen, through the mounting means of LED lamp and PCB board magnetite absorption formula, it becomes simple convenient to make the installation of LED lamp on the PCB board, simultaneously through the design of positioning mechanism and locating hole, can assist the fixed of LED lamp for PCB board position to make the connection of LED lamp on the PCB board relatively stable.

2. The utility model relates to a be applicable to ear temperature rifle LED backlight for display screen, through the fixed mode of screw rod of limiting plate and PCB board, make the limiting plate for PCB board convenient to detach, when the limiting plate lid was on the PCB board, provide the sufficient stability of LED lamp to when the limiting plate was putd aside simultaneously, make simple fixed LED lamp expose, thereby the user carries out independent change to the LED lamp of damage.

Drawings

FIG. 1 is a schematic top view of an LED backlight PCB structure for a display screen of an ear thermometer according to the present invention;

FIG. 2 is a schematic view of the lower end surface of the PCB structure of the present invention;

FIG. 3 is a schematic view of the LED lamp according to the present invention;

FIG. 4 is a schematic view of the connection structure of the components of the LED backlight source for the display screen of the ear thermometer of the present invention;

fig. 5 is an enlarged view of the area of fig. 4A.

In the figure:

1. a PCB board; 11. a lamp hole; 12. an adsorption tank; 13. a positioning mechanism; 14. a threaded hole; 15. magnet A

131. A spring; 132. a spring pin;

2. an LED lamp; 21. a housing; 22. an adsorption block; 23. a magnet B; 24. positioning holes; 25. an LED lamp wick;

3. a limiting plate; 31. and (4) a soft connection layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1-5, which illustrate a preferred embodiment of the present invention, a LED backlight source for ear thermometer display screen, comprising a PCB board 1, wherein the inner side of the PCB board 1 is movably connected with a plurality of groups of LED lamps 2, the groups of LED lamps 2 are distributed in a rectangular shape at the inner side of the PCB board 1, and the lower end of the PCB board 1 is fixedly connected with a limiting plate 3.

The PCB 1 comprises a lamp hole 11, the lamp hole 11 penetrates through the inner side of the PCB 1, adsorption grooves 12 are formed in the two sides, located on the lamp hole 11, of the lower end of the PCB 1, a positioning mechanism 13 is arranged on the surface of the inner side of the lamp hole 11, threaded holes 14 are formed in the position, close to four corners, of the lower end of the PCB 1, a magnet A15 is further arranged inside the PCB 1, an adsorption block 22 can be connected in an embedded mode through the arrangement of the adsorption grooves 12, meanwhile, the magnet A15 and the magnet B23 are adsorbed, the LED lamp 2 can be conveniently assisted to be placed in the inner side of the PCB 1, and the position, relative to the PCB 1, of the LED lamp 2 is fixed through the arrangement of; the LED lamp 2 comprises a shell 21, two groups of adsorption blocks 22 are symmetrically connected to the outer surface of the shell 21 about the axis of the shell 21, magnets B23 are arranged on the inner side, close to the top, of the adsorption blocks 22, two groups of positioning holes 24 are symmetrically arranged on the outer surface of the shell 21 about the axis of the shell 21, the LED lamp 2 is movably connected with the PCB 1 through the embedded connection of the positioning mechanisms 13 and the positioning holes 24, and the LED lamp 2 can realize the auxiliary positioning capacity through the adsorption of a magnet B23 and a magnet A15 through the arrangement of a magnet B23; the limiting plate 3 further comprises a soft connection layer 31, the soft connection layer 31 is fixedly connected to the upper end of the limiting plate 3, the distribution state of the soft connection layer 31 corresponds to the distribution state of the LED lamps 2, the limiting plate 3 is fixedly connected with the PCB 1 through the threaded holes 14, and the soft connection layer 31 is arranged to prevent excessive extrusion on pins extending out of the lower end of the LED lamps 2 after the limiting plate 3 is connected with the PCB 1, so that the pins are broken; the positioning mechanism 13 is composed of a spring 131 and a semicircular elastic pin 132, one end of the spring 131 is connected to the elastic pin 132, the other end of the spring 131 is connected to the inner wall of the PCB board 1, the elastic pin 132 is elastically connected with the inner wall of the PCB board 1 through the spring 131, the outer diameter of the elastic pin 132 is matched with the inner diameter of the positioning hole 24, the position relation between the LED lamp 2 and the PCB board 1 can be relatively fixed through the elastic connection of the elastic pin 132 and the spring 131, and meanwhile, the LED lamp 2 can be conveniently detached and replaced; the material that connects layer 31 soft is the rubber material, and the shape that connects layer 31 soft is circular, and the size of a dimension that connects layer 31 soft is greater than the size of a dimension of LED lamp 2 lower extreme, through the setting of rubber material, prevents that

soft layer

31 and 25 contact from taking place the electric leakage, and the inboard of LED lamp 2 still is provided with 25, can provide the luminous light source of LED lamp 2 through the setting of 25.

The utility model discloses a work flow and principle: the user simply inserts the LED lamp 2 into the PCB 1, the magnet A15 will adsorb the positioning mechanism 13 to assist the stability of the LED lamp 2 relative to the PCB 1, the user will push the LED lamp 2 with a little force, the positioning hole 24 will be jointed with the positioning mechanism 13, thereby relatively firmly fixing the position relation between the LED lamps 2 and the PCB board 1, then a user puts a plurality of groups of LED lamps 2 into the PCB board 1 in sequence, and a plurality of groups of LED lamps 2 are connected in parallel, then the limit plate 3 is fixedly connected with the lower end of the PCB board 1 through a screw rod, so that the soft connecting layer 31 is abutted against the upper end of the LED lamps 2, thereby thoroughly reinforcing the position relation of the LED lamps 2 relative to the PCB board 1, when one group or a plurality of groups of LED lamps 2 have problems, the user only needs to open limiting plate 3, will correspond LED lamp 2 that needs the replacement and take out the back from PCB board 1, and the limiting plate 3 can on replacing well and covering again.

The above description is for further details of the present invention, and it is not assumed that the embodiments of the present invention are limited to these descriptions, and it is obvious to those skilled in the art that the present invention can be implemented by a plurality of simple deductions or replacements without departing from the concept of the present invention, and all should be considered as belonging to the protection scope defined by the claims submitted by the present invention.

Claims

1. The utility model provides a be applicable to ear temperature rifle LED backlight for display screen which characterized in that: including PCB board (1), the inboard swing joint of PCB board (1) has a plurality of LED lamps of group (2), and a plurality of groups LED lamp (2) are the rectangle and distribute in the inboard of PCB board (1), the lower extreme fixedly connected with limiting plate (3) of PCB board (1).

2. The LED backlight source suitable for the display screen of the ear thermometer according to claim 1, wherein: PCB board (1) includes lamp hole (11), lamp hole (11) run through the inboard of seting up in PCB board (1), adsorption tank (12) have been seted up to the both sides that the lower extreme of PCB board (1) is located lamp hole (11), the inboard surface of lamp hole (11) is provided with positioning mechanism (13), threaded hole (14) have been seted up to the position that PCB board (1) lower extreme is close to the four corners, the inside of PCB board (1) still is provided with magnetite A (15).

3. The LED backlight source suitable for the display screen of the ear thermometer according to claim 1, wherein: LED lamp (2) are including casing (21), the surface of casing (21) is connected with two sets of absorption piece (22) about casing (21) axle center symmetry, it is provided with magnetite B (23) to adsorb the inboard that piece (22) are close to the top, the surface of casing (21) still is equipped with two sets of locating hole (24) that are the axle center symmetry about casing (21), LED lamp (2) are connected with PCB board (1) swing joint through the gomphosis of positioning mechanism (13) and locating hole (24).

4. The LED backlight source suitable for the display screen of the ear thermometer according to claim 1, wherein: limiting plate (3) still include soft layer (31) that connects, soft layer (31) fixed connection in the upper end of limiting plate (3) that connects, just soft distribution state that connects layer (31) and the distribution state of LED lamp (2) to corresponding, limiting plate (3) are through screw hole (14) and PCB board (1) fixed connection.

5. The LED backlight source suitable for the display screen of the ear thermometer according to claim 2, wherein: the positioning mechanism (13) is composed of a spring (131) and a semicircular elastic pin (132), one end of the spring (131) is connected to the elastic pin (132), the other end of the spring (131) is connected to the inner wall of the PCB (1), the elastic pin (132) is elastically connected with the inner wall of the PCB (1) through the spring (131), and the outer diameter size of the elastic pin (132) is matched with the inner diameter size of the positioning hole (24).

6. The LED backlight source suitable for the display screen of the ear thermometer as claimed in claim 4, wherein: the soft connecting layer (31) is made of rubber, the soft connecting layer (31) is circular, and the size of the soft connecting layer (31) is larger than that of the lower end of the LED lamp (2).

7. The LED backlight source suitable for the display screen of the ear thermometer according to claim 3, wherein: the inner side of the LED lamp (2) is also provided with a (25).