CN213089576U

CN213089576U - Point light source type dome illumination structure suitable for code scanner

Info

Publication number: CN213089576U
Application number: CN202022156713.0U
Authority: CN
Inventors: 李亭
Original assignee: Suzhou Kaishi Information Technology Co ltd
Current assignee: Suzhou Kaishi Information Technology Co ltd
Priority date: 2020-09-27
Filing date: 2020-09-27
Publication date: 2021-04-30
Anticipated expiration: 2030-09-27

Abstract

The utility model provides a point light source dome lighting structure suitable for a code scanner, which comprises a point light source, a triple prism and a diffuse reflection surface; the diffuse reflection surface is of a dome structure, the top end of the diffuse reflection surface is fixedly provided with a triangular prism, the bottom of the diffuse reflection surface is over against a code scanning window of the code scanner, and the point light source is fixedly arranged above the triangular prism and the dome. The utility model discloses replace a plurality of light sources in traditional dome illumination structure with the combination of single-point light source and prism, adopt reflection of light formula dome illumination optical structure, light after the refraction reaches the effect of dome illumination after the diffuse reflection surface reflection of dome structure, optical structure is reasonable, used device is small in quantity, small and the equipment is simple, low cost, be particularly suitable for being arranged in bar code scanning device, form the bright spot easily when can effectively avoiding scanning the bar code on the high reflection of light material, the influence is swept the condition of sign indicating number result, the efficiency and the success rate of sign indicating number are swept in the improvement.

Description

Point light source type dome illumination structure suitable for code scanner

Technical Field

The utility model relates to a bar code scanner's illumination structure especially relates to a point light source type dome illumination structure suitable for bar code scanner.

Background

In a handheld or fixed code scanner, point light source direct illumination is a common method, but for a bar code printed on a high-reflection material, bright spots are easily formed by point light source illumination, and the interference of local bright spots can be obviously reduced by dome illumination in the scene, so that a bar code photo with uniform brightness and high contrast is obtained. The common dome lighting has a reflective type and a back-lighting type, the traditional design needs a plurality of LEDs to form annular or planar distribution, the number of elements is large, the assembly is complex, and the traditional design is not suitable for a handheld or fixed code scanner with a small structure, so that a point light source type dome lighting structure suitable for the code scanner is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art, and providing a point light source type dome lighting structure suitable for a code scanner.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a point light source dome-like illumination structure suitable for a code scanner comprises a point light source, a triple prism and a diffuse reflection surface; the diffuse reflection surface is of a dome structure, the triangular prism is fixedly installed at the top end of the diffuse reflection surface, the bottom of the diffuse reflection surface is over against a code scanning window of the code scanner, the point light source is fixedly installed above the triangular prism and the dome, and light rays emitted by the point light source enter the interior of the diffuse reflection surface after being refracted by the triangular prism and are reflected to the code scanning window of the code scanner through the diffuse reflection surface.

Preferably, the point light source is a single LED light source.

Preferably, the triangular prism is a pyramid.

Preferably, a central axis of the triangular prism coincides with a central axis of the diffuse reflection surface.

Preferably, the point light source is located directly above the triangular prism.

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

the utility model discloses replace a plurality of light sources in traditional dome illumination structure with the combination of single-point light source and prism, adopt reflection of light formula dome illumination optical structure, make the light that the pointolite sent become multiunit light after a plurality of side refractions of prism, be equivalent to a plurality of light sources and be luminous, light after the refraction reaches the effect of dome illumination after the diffuse reflection surface reflection of dome structure. The utility model discloses optical structure is reasonable, and used device is small in quantity, and is small and the equipment is simple, and low cost is particularly suitable for being arranged in bar code scanner, replaces the method of the pointolite direct lighting that present bar code scanner is commonly used, forms the bright spot easily when can effectively avoiding scanning the bar code on the high reflection of light material, influences the condition of sweeping the sign indicating number result, improves the efficiency and the success rate of sweeping the sign indicating number.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a point source dome-like illumination structure suitable for use in a code scanner.

Detailed Description

In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1, a point light source type 1 dome lighting structure suitable for a code scanner includes a point light source 1, a triple prism 2, and a diffuse reflection surface 3; the diffuse reflection surface 3 is of a dome structure, the triangular prism 2 is fixedly installed at the top end of the diffuse reflection surface 3, the bottom of the diffuse reflection surface 3 is over against a code scanning window of the code scanner, the point light source 1 is fixedly installed above the triangular prism 2 and the dome, light rays emitted by the point light source 1 enter the diffuse reflection surface 3 after being refracted by the triangular prism 2, and are reflected to the code scanning window of the code scanner through the diffuse reflection surface 3.

The utility model discloses an illumination structure is arranged in bar code scanner, and what used commonly in bar code scanner is 1 direct lighting of pointolite at present, the utility model discloses an it has prism 2's diffuse reflection face 3 to increase a dome central authorities in 1 the place ahead of pointolite for the light that single point light source 1 launches changes through prism 2's a plurality of side refraction rears, reaches the luminous effect of multiple point light source 1, and through dome structure's diffuse reflection face 3 reflection, final illumination effect is the effect of reflection of light formula dome illumination. The utility model discloses the optical structure who will originally 1 direct irradiation of pointolite in the bar code scanner changes into the optical structure of reflection of light formula dome illumination, solves the problem that the bar code that 1 direct illumination of pointolite high reflection of light material printed forms the bright spot easily, can effectively reduce the interference of local bright spot, and it is even to obtain luminance fast accurately, and the bar code photo that the contrast is high effectively improves the efficiency and the rate of accuracy of bar code scanning.

Preferably, the point light source 1 is a single LED light source, has a small size, low power consumption and a long service life, emits less heat while maintaining high brightness, and is suitable for use in a barcode scanner.

In an embodiment, the prism 2 is a pyramid, the point light source 1 emits light rays around 360 degrees by taking the point light source as a center, and the diffuse reflection surface 3 is a dome structure, so that the triangular prism 2 is more suitable for the device, and the light rays emitted by the point light source 1 are respectively refracted by three side surfaces of the prism 2 and then are incident to the diffuse reflection surface 3 from the bottom surface of the prism at different angles, so as to simulate the light rays emitted by the point light source 1 at different positions.

Further, the central axis of the triple prism 2 coincides with the central axis of the diffuse reflection surface 3; the point light source 1 is positioned right above the triangular prism 2; the light can be ensured to be uniformly emitted from all directions in the center of the top of the diffuse reflection surface 3 and reflected by the diffuse reflection surface 3, and finally, the light received by the bar code before the code scanning window is relatively uniform scattered light in different directions, so that a bar code photo with uniform brightness and high contrast can be obtained.

The present invention has been described in relation to the above embodiments, which are only examples for implementing the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, all changes and modifications which do not depart from the spirit and scope of the present invention are deemed to fall within the scope of the present invention.

Claims

1. A point light source dome-like illumination structure suitable for a code scanner, characterized in that: the device comprises a point light source, a prism and a diffuse reflection surface; the diffuse reflection surface is of a dome structure, the triangular prism is fixedly installed at the top end of the diffuse reflection surface, the bottom of the diffuse reflection surface is over against a code scanning window of the code scanner, the point light source is fixedly installed above the triangular prism and the dome, and light rays emitted by the point light source enter the interior of the diffuse reflection surface after being refracted by the triangular prism and are reflected to the code scanning window of the code scanner through the diffuse reflection surface.

2. The spot light source dome-like illumination structure for a code scanner of claim 1, wherein: the point light source is a single LED light source.

3. The spot light source dome-like illumination structure for a code scanner of claim 1, wherein: the triangular prism is a pyramid.

4. The spot light source dome-like illumination structure for a code scanner of claim 3, wherein: the central axis of the triangular prism is superposed with the central axis of the diffuse reflection surface.

5. The spot light source dome-like illumination structure for a code scanner of claim 4, wherein: the point light source is located right above the triangular prism.