CN201739919U

CN201739919U - Lighting source for image reading device

Info

Publication number: CN201739919U
Application number: CN 201020298900
Authority: CN
Inventors: 王虎岩; 戚务昌; 曾海韵
Original assignee: Weihai Hualing Opto Electronics Co Ltd
Current assignee: Weihai Hualing Opto Electronics Co Ltd
Priority date: 2010-08-20
Filing date: 2010-08-20
Publication date: 2011-02-09
Anticipated expiration: 2020-08-20

Abstract

The utility model discloses a novel lighting source for an image reading device. The lighting source comprises a lighting unit, a casing and a light guide body, and is characterized in that the lighting unit is connected with the casing through a connecting sleeve. The utility model overcomes the defects of a conventional lighting source that a light guide body drops off easily, light leaks from the joint of a lighting unit and the light guide body, and the performance is unstable. Meanwhile, a groove is formed on the connecting sleeve, and lug bosses are designed on the casing according to a specific rule, so that the lighting source can be cut off as required, and various length requirements can be satisfied; and the utility model has the advantages of low cost, tight connection, reliable fixing, stable performance, long service life and the like.

Description

The image read-out lighting source

Technical field

The utility model relates to novel image read-out lighting source, is a kind of combined type image read-out lighting source specifically.

Background technology

Along with the development of information technology, the application of contact-type image sensor (CIS) more and more widely, and is also more and more higher to the requirement of contact-type image sensor, and kind is also more and more.Supporting with it lighting source is an indispensable critical component in the contact-type image sensor (CIS), and its performance directly influences the performance of contact-type image sensor.Therefore, also just more and more higher to the requirement of lighting source, particularly also more and more to the requirement of different length.We know, the length of the lighting source that existing contact imageing sensor (CIS) is used all is to determine according to sweep length, every kind of sweep length substantially all needs the lighting source of respective length corresponding with it, and the lighting source of every kind of length just needs a whole set of mould to finish, and is with high costs.Simultaneously, existing leaded light bar also exist fixing unreliable, problem such as abnormal sound is arranged, these problems can cause luminescence unit can not closely to contact with light conductor, cause the conductive quantity instability of light leak or light, thereby directly influence the performance of contact-type image sensor.

Summary of the invention

The technical problems to be solved in the utility model is, provides a kind of and not only can satisfy multiple length requirement, reduces cost, simultaneously again can secure fixation, installation, and the image read-out lighting source of dependable performance.

The utility model reaches by following measure.

A kind of image read-out lighting source comprises: luminescence unit, shell, light conductor, adapter sleeve is characterized in that described luminescence unit is connected with shell by adapter sleeve.

Luminescence unit described in the utility model comprises: the PCB substrate of illuminator, carrying illuminator.

Luminescence unit described in the utility model is connected with adapter sleeve by riveted joint, welding or other modes.

Shell described in the utility model is connected with light conductor by buckle, draw-in groove mode, several grooves generally are set on light conductor, on the corresponding position of shell, several boss are set, behind shell that light conductor is packed into, boss in the described shell just snaps in the groove on the light conductor, shell and light conductor are combined closely, and light conductor just can not come off or left and right sides play in shell.Every specific distance a boss is set on shell, the position of these boss is according to the requirement of length of illumination design.The shell that assembles and light conductor are inserted adapter sleeve, and the boss on the shell just snaps in the groove on the adapter sleeve, and luminescence unit and light conductor are coupled together.The light that luminescence unit sends enters light conductor, by the reflective graphics that is printed on the light conductor light is transmitted to afterbody, and equably from the exit portal ejaculation of light conductor, shines on the original copy.

The utility model only needs a mold, and the lighting source of various full-lengths not only can be provided, and the light source of random length also can be provided, and greatly reduces product cost, simultaneously, also has advantages such as easy for installation, dependable performance, long service life.

Description of drawings.

Fig. 1 is the general assembly drawing of an exemplary embodiment of the present utility model.

Fig. 2 is the assembling section according to adapter sleeve of the present utility model and shell.

Fig. 3 is the assembling section according to shell of the present utility model and light conductor.

Fig. 4 is the general assembly drawing of another exemplary embodiment of the present utility model.

Fig. 5 is that adjustable length of the present utility model is blocked schematic diagram.

The specific embodiment.

Also in conjunction with the accompanying drawings the utility model is elaborated below by instantiation.

Fig. 1 is the general assembly drawing of the exemplary embodiment of lighting source of the present utility model, is labeled as among the figure: luminescence unit 1, adapter sleeve 2, shell 3, light conductor 4.

Luminescence unit 1 is the luminous component of lighting source described in the utility model, and it is made up of circuit board (PCB) and the LED illuminator that is welded on the PCB, is responsible for the utility model light source is provided, and it is same as the prior art, and this does not give unnecessary details.

Light conductor 4 is optical transmission components of the present utility model, its effect is exactly the afterbody that the light that above-mentioned luminescence unit 1 sends is transmitted to equably lighting source, and by the figure that is printed on the light conductor 4 light is reflected away from exit portal, be radiated on the original copy uniformly.The problem that existing lighting source exists light conductor to come off from shell has easily caused the lighting source unstable properties, also just must influence the performance of contact-type image sensor (CIS).As can be seen from Figure 3, the utility model is provided with groove 401 on light conductor 4, on shell 3, be provided with boss 301, with the boss 301 on the 401 embedding shells 3 of the groove on the light conductor 4, just light conductor 4 and shell 3 can be linked together closely, prevent light conductor 4 about shell 3 inside, move forward and backward, guaranteed the stability of above-mentioned lighting source performance.

Shell 3 is carriers of light conductor 4, and its main effect is exactly to carry light conductor 4, and protection light conductor 4 is not damaged by external force, because any scuffing or defective all can influence light conductor 4 conducting light, influences the performance of lighting source.Simultaneously, shell 3 can prevent that extraneous light from entering light conductor 4, can prevent that also the light of light conductor inside from penetrating from other positions, causes the inhomogeneous or intensity reduction of light.The utility model has increased boss 301 on shell 3, shell 3 and light conductor 4 are combined closely, and can prevent effectively that light conductor 4 from scratching and light is revealed the problems such as unstable properties that cause.In addition, also be provided with the boss 302 that cooperates with adapter sleeve on the shell 3.

Adapter sleeve 2 is critical components of the present utility model, and its effect is exactly that light conductor 4 and the shell 3 that will assemble couple together with luminescence unit 1.As shown in Figure 2, the utility model is provided with boss 302 on shell 3, on adapter sleeve 2, be provided with groove 201, shell 3 is inserted adapter sleeve 2, boss 302 snaps in groove 201, like this, adapter sleeve 2 just is closely linked with shell 3, and as shown in Figure 1, adapter sleeve 2 fits together by riveted joint or other modes with luminescence unit 1, like this, just light conductor 4 and luminescence unit are linked together, prevent excesssive gap between luminescence unit 1 and the light conductor 4 by adapter sleeve 2, the luminous energy that luminescence unit 1 is sent directly enters light conductor, simultaneously, adapter sleeve 2 can also prevent that the light that luminescence unit 1 sends from leaking from the joint portion with light conductor 4, can prevent that also outside light from entering the influence of light conductor 4 backs to ordinary ray from the joint portion.

Fig. 4 is another embodiment of the present utility model, and by adapter sleeve 2, each is connected with a luminescence unit 1 at the two ends of light conductor 4.Because the effect of boss 302 and groove 201, light conductor 4 and two luminescence units 1 can closely link together, and so not only can improve the brightness of lighting source, also can improve the homogeneity of light source simultaneously.

Fig. 5 is another embodiment of the present utility model, respectively the A from figure B light conductor 4 and shell 3 are blocked, just can obtain the lighting source of different length, with the needs of the contact-type image sensor (CIS) that satisfies different scanning length.Though light conductor in the past also can block use, owing to there is not groove 301, boss 401 causes light conductor to be connected defective tightness with shell, makes unstable properties.The utility model rule of thumb, design a plurality of boss 302 by specific distance on shell 3, length is as required blocked light conductor 4 and shell 3, by the groove 201 on boss 302 and the adapter sleeve 2, light conductor 3 and luminescence unit 1 are closely coupled together then.Just obtain connecting closely, fixing reliable, stable performance, can satisfy the lighting source of length requirement again.

Claims

1. an image read-out lighting source is provided with luminescence unit, shell and light conductor, it is characterized in that luminescence unit is connected with shell through adapter sleeve.

2. a kind of image read-out lighting source according to claim 1 is characterized in that adapter sleeve is provided with groove, and shell is provided with boss, and adapter sleeve is connected with shell with groove through boss.