Laser diode device incorporating structure with integral scanning motor

• US 5,198,651 A
• Filed: 05/03/1991
• Issued: 03/30/1993
• Est. Priority Date: 05/03/1991
• Status: Expired due to Term

• Current Assignee: Symbol Technologies, Inc. (Zebra Technologies Corporation)
• Original Assignee: Symbol Technologies, Inc. (Zebra Technologies Corporation)
• Inventors: Barkan, Edward, Shepard, Howard
• Primary Examiner(s): LaRoche, Eugene R.
• Assistant Examiner(s): Nguyen, Tan
• Application Number:
  US07/695,075
• Time in Patent Office: 697 Days
• Field of Search: 235/472, 235/454, 235/455, 235/462, 235/467, 235/469, 310/51, 310/91, 248/560
• US Class Current: 235/462.43
• CPC Class Codes: G06K 2207/1016 Motor control or optical moving unit control
• CPC Class Codes: G06K 7/10881 constructional details of hand-held scanners
• CPC Class Codes: G06K 7/1098 the scanning arrangement having a modular construction

Abstract

A laser scanning device for projecting a laser beam against a target having information contained thereon which is to be scanned by the laser beam. The device is in particular a compact bar code reader which incorporates internal unitary structure with a resiliently mounted integral scanning motor for compactly supporting various laser and optics components for modular installation in the device, and which protects at least the integral scanning motor from external impacts and shock loads.

Claims

1. A laser scanning device for projecting a laser beam against a target having information thereon which is to be scanned by said laser beam, said device comprising:

housing means enabling manual handling of said device; and

a unitary framework structure insertable into said housing means, and operative for modularly mounting operative components of said laser scanning device, including laser generating means, optical means, photodetector means and a scanning motor for said laser scanning device, said unitary framework structure including flexible external shock-absorbing means integrally formed with said structure, and operative for resiliently supportably mounting said scanning motor on said structure against external impacts and shock loads imparted to said device prior to said external impacts and shock loads being transmitted to said scanning motor.

2. A laser scanning device as claimed in claim 1, wherein said unitary structure upon insertion into said housing means is supportable on a printed circuit board having circuitry thereon for completing operative interconnections of said operative components of the laser scanning device.

3. A laser scanning device as claimed in claim 1, wherein said flexible shock absorbent means comprises at least one flexible arm member;

and resilient spring means interconnecting said scanning motor and said at least one flexible arm member.

4. A laser scanning device as claimed in claim 3, comprising two of said flexible arm members formed on said unitary framework structure each on an opposite side of said scanning motor, and a pair of said resilient spring means each engaging said scanning motor and respectively one of said arm members.

5. A laser scanning device as claimed in claim 4, wherein said scanning motor comprises a film resonant motor, each said resilient spring means comprising a film spring.

6. A laser scanning device as claimed in claim 3, wherein said at least one flexible arm member comprises a resilient bearing support for bearings of said scanning motor.

7. A laser scanning device as claimed in claim 3, wherein said at least one flexible arm member comprises a bearing support for a bearing of said scanning motor.

8. A laser scanning device as claimed in claim 3, wherein said unitary framework structure comprises a lightweight plastic frame having substantially rigid wall portions for mounting said laser generating means and photodetector means, and wherein said at least one flexible arm member is modularly insertable with said operative components into said housing mean as a preassembled unit.

9. A laser scanning device as claimed in claim 1, wherein said scanning motor comprises a D.C. motor.

10. A laser scanning device as claimed in claim 1, wherein said scanning motor comprises a galvo motor.

11. A laser scanning device as claimed in claim 1, wherein said motor comprises a stepper motor.

12. A laser scanning device as claimed in claim 1, wherein said housing means comprises a gun-shaped lightweight, plastic structure having a pistol grip which is manually supportable by a user.

13. A laser scanning device as claimed in claim 1, wherein said scanning device comprises a bar code reader for reading a bar code symbol on the target.

14. A method of arranging operative components in a laser scanning device utilized for projecting a laser beam against a target having information thereon which is to be scanned by said laser beam, wherein said device includes housing means enabling manual handling of said device, comprising the steps of:

inserting a unitary framework structure into said housing means for modularly mounting operative components of said laser scanning device, including laser generating means, optical means, photodetector means and a scanning motor for said laser scanning device; and

resiliently mounting said scanning motor on flexible external shock-absorbing means integrally formed with said unitary framework structure for resiliently supportably mounting said scanning motor on said structure against external impacts and shock loads imparted to said laser scanning device prior to said external impacts and shock loads being transmitted to said scanning motor.

15. A method as claimed in claim 14, wherein said unitary framework structure and said operative components of said laser scanning device are supportable on a printed circuit board for positioning in said housing means.

16. A method as claimed in claim 15, wherein said flexible shock-absorbing means is configured as at least one flexible arm member integral with said unitary framework structure;

and the step of interconnecting said scanning motor and said at least one flexible arm member with resilient spring means for the shock-absorbent mounting of said scanning motor on said unitary framework structure.

17. A method as claimed in claim 16, comprising the steps of providing two of said flexible arm members on said unitary framework structure each on an opposite side of said scanning motor, and providing a pair of said resilient spring means each engaging said scanning motor and respectively one of said arm members.

18. A laser scanning device as claimed in claim 17, wherein said scanning motor comprises a film resonant motor, each said resilient spring means comprising a film spring.

19. A method as claimed in claim 14, wherein said housing means is configured as a gun-shaped, lightweight, plastic structure having a pistol grip which is manually supportable by a user.

20. A method as claimed in claim 14, wherein said scanning device comprises a bar code reader for reading a bar code symbol on the target.

21. A method as claimed in claim 14, wherein said scanning motor comprises a D.C. motor.

22. A method as claimed in claim 14, wherein said scanning motor comprises a galvo motor.

23. A method as claimed in claim 14, wherein said motor comprises a stepper motor.