Optical assembly for scanning engine

Patent metadata

Field	Value
Publication number	US-10210367-B1
Application number	US-201715852036-A
Country	US
Kind code	B1
Filing date	Dec 22, 2017
Priority date	Dec 22, 2017
Publication date	Feb 19, 2019
Grant date	Feb 19, 2019

Abstract

In a handheld scanning device, a support frame configured to physically support an indicia scanning engine configured to scan and interpret an indicia and a light pipe within a casing of a scanning device. The light pipe extends along and flush against a surface of a planar portion of the support frame. Multiple ribs of elongate shape are formed integrally with the planar portion. A plurality of the ribs of the multiple ribs each define a gap in the elongate shape through which the light pipe may extend. The support frame may support the indicia scanning engine and the light pipe in predetermined relative positions to cause a central projection axis along which light is projected from an outlet end of the light pipe to extend in parallel with a central scanning axis extending from a front end of the indicia scanning engine, and toward a surface that carries the indicia.

First claim

The invention claimed is:

1. A support frame configured to physically support both an indicia scanning engine configured to scan and interpret an indicia and a light pipe within a casing of a scanning device, the support frame comprising:
a planar portion that extends between the indicia scanning engine and the light pipe, wherein an external surface of a middle length of the light pipe extends along and flush against a planar surface of the planar portion of the support frame;
a holder formed integrally with the planar portion to support a light source in a position aligned with an inlet end of the light pipe to enable light emitted by the light source to reach the inlet end; and
multiple ribs of elongate shape formed integrally with the planar portion, wherein:
the multiple ribs extend from the planar surface of the planar portion to strengthen the support frame;
a plurality of the ribs of the multiple ribs each define a gap in the elongate shape through which the middle length of the light pipe extends; and
the support frame supports the indicia scanning engine and the light pipe in predetermined relative positions to cause a central projection axis along which light is projected from an outlet end of the light pipe to extend in parallel with a central scanning axis extending from a front end of the indicia scanning engine, and toward a surface that carries the indicia.

2. The support frame of claim 1 , wherein:
a rib of the multiple ribs is configured to form a diaphragm that is interposed between the light source and the inlet end of the light pipe; and
the diaphragm defines an aperture through which light emitted by the light source passes to reach the inlet end of the light pipe; and
a shape of the aperture defines a shape of the light projected from the outlet end of the light pipe.

3. The support frame of claim 1 , wherein:
the casing of the scanning device comprises a scanning head portion inside of which the indicia scanning engine, the light pipe and the support frame are located, and an elongate handle portion connected at one end of the elongate handle portion to an external surface of a bottom wall of the scanning head portion;
the multiple ribs extend from the planar surface of the planar portion of the support frame and towards an inner surface of another wall of the scanning head portion of the casing; and
the other wall of the scanning head portion of the casing is selected from a group consisting of a top wall of the scanning head portion that is opposite the bottom wall of the scanning head portion, and a side wall of the scanning head portion that extends between the top wall and the bottom wall.

4. The support frame of claim 3 , wherein the multiple ribs engage another component of the scanning device within the scanning head portion to maintain the support frame at a first selected location and orientation within the scanning head portion to enable the support frame to physically support the indicia scanning engine at a second selected location and orientation within the scanning head portion, and the light pipe at a third selected location and orientation within the scanning head portion.

5. The support frame of claim 3 , wherein the multiple ribs engage the inner surface of the other wall of the scanning head portion to maintain the support frame at a first selected location and orientation within the scanning head portion to enable the support frame to physically support the indicia scanning engine at a second selected location and orientation within the scanning head portion, and the light pipe at a third selected location and orientation within the scanning head portion.

6. The support frame of claim 1 , wherein the light pipe comprises:
an elongate outlet length interposed between the middle length and the outlet end, and extending in front of the front end of the indicia scanning engine;
a first bend formed in the light pipe where the middle length and the outlet length of the light pipe meet at a right angle, the first bend comprising a first angled surface to cause reflection of light transmitted through the middle length from the inlet end and into the outlet length; and
a second bend formed in the light pipe where the outlet length meets the outlet end, the second bend comprising a second angled surface to cause reflection of light transmitted through the outlet length from the first bend and out of the light pipe through the outlet end.

7. The support frame of claim 6 , wherein the light pipe comprises:
an inlet lens at the inlet end to receive light emitted by the light source; and
an outlet lens at the outlet end to project the light conveyed through the light pipe from the inlet end to the outlet end.

8. The support frame of claim 6 , wherein:
the casing of the scanning device comprises a scanning window formed of a second transparent material;
the support frame physically supports the light pipe in a position and orientation relative to the indicia scanning engine to cause the outlet length, the second bend and the outlet end of the light pipe to extend into a position that is interposed between the indicia scanning engine and the scanning window; and
the indicia scanning engine and the outlet end of the light pipe are oriented relative to the scanning window to cause the central scanning axis and the central projection axis to extend through the scanning window.

9. The support frame of claim 1 , wherein:
the indicia scanning engine comprises a collimated light emitter to emit collimated light along a central illumination axis that extends parallel to the central scanning axis and the central projection axis; and
the collimated light emitter emits the collimated light to illuminate at least a portion of the indicia during scanning of the indicia.

10. A scanning device comprising:
an indicia scanning engine configured to scan an indicia carried on a surface;
a light source;
a light pipe formed of a first transparent material, and comprising an inlet end to receive light emitted by the light source, an elongate middle length, and an outlet end to project light conveyed through the light pipe from the inlet end and through the middle length to the outlet end; and
a support frame configured to physically support the indicia scanning engine and the light pipe in predetermined relative positions within a casing of the scanning device to cause a central projection axis along which light is projected from the outlet end to extend in parallel with a central scanning axis extending from a front end of the indicia scanning engine, and toward the surface that carries the indicia, wherein:
the support frame comprises a planar portion that extends between the indicia scanning engine and the light pipe; and
an external surface of the middle length of the light pipe extends along and flush against a planar surface of the planar portion of the support frame.

11. The scanning device of claim 10 , wherein:
the support frame comprises multiple ribs of elongate shape formed integrally with the planar portion and extending from the planar surface of the planar portion to strengthen the support frame; and
a plurality of the ribs of the multiple ribs each define a gap in the elongate shape through which the middle length of the light pipe extends and is supported by the multiple ribs.

12. The scanning device of claim 11 , wherein:
the casing of the scanning device comprises a scanning head portion inside of which the indicia scanning engine, the light pipe and the support frame are located, and an elongate handle portion connected at one end of the elongate handle portion to an external surface of a bottom wall of the scan

Assignees

• Datalogic IP Tech Srl

Inventors

• Quattrini Paolo
• Gnan Marco

Classifications

• G06K2207/1011

  Aiming · CPC title

• H05B45/20

  Controlling the colour of the light · CPC title

• G02B6/0008

  the light being emitted at the end of the fibre · CPC title

• G08B5/36

  using visible light sources · CPC title

• G06K7/10831 Primary

  Arrangement of optical elements, e.g. lenses, mirrors, prisms (optical elements per se G02B) · CPC title