CN201199722Y

CN201199722Y - Swing mechanism for bar code scanning apparatus

Info

Publication number: CN201199722Y
Application number: CNU2008200028609U
Authority: CN
Inventors: 廖登镇
Original assignee: JUHAO INDUSTRY Co Ltd
Current assignee: JUHAO INDUSTRY Co Ltd
Priority date: 2008-04-29
Filing date: 2008-04-29
Publication date: 2009-02-25
Anticipated expiration: 2018-04-29

Abstract

The utility model relates to a swing mechanism of a bar code scanning device, which is used for scanning a bar code to be scanned by a laser beam generated by a laser light source of the bar code scanning device under the swing action of the swing mechanism; wherein, the swing mechanism comprises a swing body, a magnetic element and a reflecting element, wherein, the swing body comprises a positioning part, a frame body part and at least two twisted arms, wherein, the frame body part is provided with a magnetic element junction surface and a reflecting element junction surface, and all the twisted arms are connected with the selected positions of the positioning part and the frame body part; the magnetic element is positioned on the magnetic element junction surface of the frame body part of the swing body; and the reflecting element is arranged on the reflecting element junction surface of the frame body part of the swing body and used for reflecting the laser beams generated by the laser light source.

Description

The swing mechanism of bar code scanner

Technical field

The utility model is the mechanism about a kind of bar code scanner, particularly about a kind of swing mechanism of bar code scanner.

Background technology

For can be rapidly and read price and other product information of every product efficiently, bar code scanner has been widely used in the various fields at present, for example all generally adopts bar code scanner as electronic assistance aids in occasions such as department store, supermarket, commodity sales field, handling of goods and materials.The calculation process of coupled computer again, and can reach the demand of saving manpower, promoting operating efficiency, automatic management.

In the structural design of bar code scanner, can project the outgoing laser beam of a dynamic scan to a bar code to be scanned in order to make bar code scanner, many relevant technology are formerly arranged in the patented technology.For example in No. 496624 patent case of TaiWan, China patent, it discloses a kind of scan driving mechanism improvement of barcode machine, its structure mainly includes a torsional device and a pushing mechanism, this torsional device has a formed body, and on formed body, dispose a bearing, respectively dispose a reflecting element and a magnetic element in the bearing both sides, promote this magnetic element with the logical magnetic of pushing mechanism, and drive whole mechanism action.

Though utilize the distortion of formed body can reach the effect that swings back and forth, be not to be stable structure because of formed body, also can cause and have error in the displacement during swing toward other direction distortion.And heal greatly when pendulum angle, the resistance power of formed thereby body is bigger, and the torsion of its generation is also non-linear, can cause the speed instability when scanning, and is difficult to accurate interpretation bar code.

In No. 524360 patent case of TaiWan, China patent, the improvement of the scanning means of its barcode machine is to utilize hairspring, reed to reach the purpose of swing as actuation element in addition.But it is, feasible comparatively difficult on the implementation because the complex structure of this kind actuation element, makings are gone up the precision prescribed height.And these elements required material variation under same movement angle is also bigger, and the reaction speed when causing scanning is slower.

In view of the above, bar code scanner has structural instability, member complexity to be difficult to make assembling and reaction speed waits problem to exist slowly in the design of swing mechanism.

The utility model content

A purpose of the present utility model provides a kind of swing mechanism of bar code scanner, and its swing mechanism that provides has stable structure, produces the distortion of other direction in the time of can avoiding swinging and causes the error in when scanning.

Another purpose of the present utility model provides a kind of swing mechanism of bar code scanner, and the composition member simple shape that it provides, assembling can not cause the difficulty on producing and keeping in repair easily.

A purpose more of the present utility model provides a kind of swing mechanism of sensitive bar code scanner, and it is littler that it swings required magnetic force, and can cooperate different carrying demands to adjust.

Above-mentioned purpose of the present utility model can realize by following technical solution, a kind of swing mechanism of bar code scanner, and this swing mechanism includes:

One pendular body includes a location division, a frame and at least two and turns round arm, and this frame has a magnetic element faying face and a reflecting element faying face, this each turn round arm and be connected in this location division and this frame;

One magnetic element is positioned on the magnetic element faying face of frame of this pendular body;

One in order to reflect the reflecting element of the laser beam that this LASER Light Source produces, and is arranged on the reflecting element faying face of the frame of this pendular body.

In preferred embodiment, this pendular body one injection molding.

In preferred embodiment, this pendular body is that the pliability material of a high elastic coefficient is made.

In preferred embodiment, the location division of this pendular body includes a fixed axis and a plastic hoop, and this plastic hoop fit is fixed on this fixed axis.

In preferred embodiment, the arm of turning round of the plastic hoop of the location division of this pendular body and this pendular body is one-body molded.

In preferred embodiment, the plastic hoop of the location division of this pendular body is that the pliability material of a high elastic coefficient is made.

In preferred embodiment, the frame of this pendular body includes a plastic frame and a framework, and this plastic frame is embedded in this framework.

In preferred embodiment, the arm of turning round of the plastic frame of the frame of this pendular body and this pendular body is one-body molded.

In preferred embodiment, the plastic frame of the frame of this pendular body is that the pliability material of a high elastic coefficient is made.

In preferred embodiment, the magnetic element faying face of the frame of this pendular body more is formed with a location structure, and this magnetic element is positioned at the magnetic element faying face of this pendular body by this location structure.

The effect of the utility model contrast background technology:

The utility model be with so that the laser beam that LASER Light Source produced of a bar code scanner via the swing effect of this swing mechanism, one bar code to be scanned is scanned, via the technological means that the utility model adopted, can be so that the Stability Analysis of Structures of the swing mechanism of bar code scanner.More can strengthen whole locating effect by fixed axis, not have the displacement of other direction when making swing, the scanning pattern of guided laser bundle does not have the situation generation of shake, beat, the error when avoiding scanning unchangeably.

And in when assembling, because of each member geometry is simple, need utilize hardly modes such as glutinous agent, screw interlocking just can in conjunction with, dismounting replace go up very convenient.But and partial component one injection molding, manufacture easily.And the space use amount of whole mechanism is little, makes the size of bar code scanner can give miniaturization.

The utility model is quick on the draw swing mechanism by turning round the design of arm when swing, do not need very big magnetic force just can have enough moment to promote, so the consumption on the electric power is lower, can effectively reduce use cost.

In addition main member of the present utility model is made because of the mode that can utilize the one injection molding, very easy can be by the thickness of adjustment element, highly, obtain different mechanics effects, to cooperate various carrying demands.

The specific embodiment that the utility model adopted will be further described by following embodiment and accompanying drawing.

Description of drawings

Fig. 1 is the stereogram that shows first embodiment of the present utility model;

Fig. 2 is the top view that shows first embodiment of the present utility model;

Fig. 3 is the illustrative view that shows first embodiment of the present utility model;

Fig. 4 is the cutaway view that shows that the first embodiment middle frame of the present utility model combines with magnetic element;

Fig. 5 is the top view that shows pendular body among first embodiment of the present utility model;

Fig. 6 is the cutaway view of 6-6 section in the displayed map 5;

Fig. 7 shows the schematic diagram of pendular body when clockwise swing among first embodiment of the present utility model;

Fig. 8 shows the schematic diagram of pendular body when counter-clockwise swing among first embodiment of the present utility model;

Fig. 9 is the top view that shows pendular body among second embodiment of the present utility model.

Description of reference numerals:

100 bar code scanners

1 LASER Light Source

2 curved mirrors

3 pendular bodies

31 location divisions

311 fixed axis

312 plastic hoops

32 frames

321 magnetic element faying faces

322 reflecting element faying faces

323 location structures

324 plastic frames

325 frameworks

33 turn round arm

4 magnetic elements

5 reflecting elements

6 driving mechanisms

7 Photoinduction devices

8 bar codes to be scanned

D1 thickness

H1, H2, H3 height

L1, L2 laser beam

Embodiment

Consult Figure 1 and Figure 2, it is stereogram and the top view of first embodiment that shows the swing mechanism of the utility model bar code scanner.As shown in the figure, in the structural design of bar code scanner 100 of the present utility model, include a LASER Light Source 1, a curved mirror 2, a pendular body 3, a magnetic element 4, a reflecting element 5, a driving mechanism 6 and a Photoinduction device 7.

Wherein the pliability material that pendular body 3 can a high elastic coefficient is made, and this pliability material can be silicon rubber (Silicon Rubber) or rubber type of material, but one injection molding more.Pendular body 3 includes a location division 31, a frame 32 and plural propping up and turns round arm 33, and each turns round arm 33 in order to connect location division 31 and frame 32.In present embodiment, turn round four end points that arm 33 is connected in frame 32, can make pendular body 3 when swing, have the maximum arm of force.Under different demands, can also then can have the less arm of force with turning round the mid point that arm 33 is connected in 32 4 long limits of frame.

Location division 31 includes a fixed axis 311 and a plastic hoop 312, and plastic hoop 312 fits are fixed on the fixed axis 311.Frame 32 has a magnetic element faying face 321 and a reflecting element faying face 322, and magnetic element faying face 321 more can be formed with a location structure 323, so that magnetic element 4 is positioned at magnetic element faying face 321.5 of reflecting elements are arranged on reflecting element faying face 322, the laser beam that is produced in order to reflector laser light source 1.

Consult shown in Figure 3ly, it is the illustrative view that shows first embodiment of the present utility model.During bar code scanner 100 actions, the magnetic force that driving mechanism 6 generations one and magnetic element 4 magnetic are repelled each other, each of pendular body 3 turned round arm 33 and promptly twisted because of stressed.When magnetic force disappears, each turns round arm 33 because of elastic-restoring force and inertia, drive reflecting element 5 and swing in an angular range of being scheduled to, the laser beam L1 that LASER Light Source 1 is produced successively reflexes on the bar code 8 to be scanned via curved mirror 2 and this reflecting element 5 thus.

And the laser beam L2 that reflects of this bar code 8 to be scanned certainly, reflex to Photoinduction device 7 via reflecting element 5 and curved mirror 2, this Photoinduction device 7 is converted to the corresponding signal of telecommunication with light signal and delivers to a control circuit (not shown) and carry out the interpretation of bar code data.

Consult shown in Figure 4ly, it is the cutaway view that shows that the first embodiment middle frame 325 of the present utility model combines with magnetic element 4.In first embodiment of the present utility model, this location structure 323 can be a dovetail groove so that magnetic element 4 can be simple and easy and firmly pincers close the location, need not utilize modes such as glutinous agent or screw interlocking.

Consult shown in Fig. 5 and 6, it is the cutaway view that shows 6-6 section among the top view of pendular body 3 among first embodiment of the present utility model and Fig. 5.Wherein the pliability material that plastic hoop 312 and plastic frame 324 can high elastic coefficients is made, and this pliability material can be silicon rubber or rubber type of material, and can be with to turn round arm 33 one-body molded.When producing, can cooperate different carrying demands, adjust the thickness D1 that turns round arm 33, and plastic hoop 312, plastic frame 324 and the height H 1, H2, the H3 that turn round arm 33, required elastic-restoring force and structural strength obtained thus.

Consult Fig. 7 and shown in Figure 8, it is to show the schematic diagram of pendular body 3 when reaching counter-clockwise swing clockwise in the utility model.Pendular body 3 is in when swing, and frame 32 is swung as jack-post with location division 31.Location division 31 is fixed-purpose, does not therefore have swing and distortion, turns round 33 on arm and can twist because of stressed, and elastic-restoring force is provided thus.32 body structures of frame are firm, more can come reinforced structure by the made framework 325 of hard material, so also can not be distorted.

In addition in order to make swing more stable, can consult shown in Figure 9ly, it is the top view that shows pendular body 3 among second embodiment of the present utility model.The structural design of this embodiment is identical with aforementioned first embodiment haply, plastic frame 324 ' is designed to circle only, all can be isometric when so each is turned round arm 33 and is provided with, make stressed unanimity, uniform elastic-restoring force is provided, makes pendular body 3 more smooth-going when swing.

Above narration only be preferred embodiment explanation of the present utility model, allly is skillful in this skill person when can doing other all improvement according to above-mentioned explanation, but these change and still belong in the spiritual and claim that defined of utility model of the present utility model.

Claims

1. the swing mechanism of a bar code scanner is characterized in that, this swing mechanism includes:

2. the swing mechanism of bar code scanner as claimed in claim 1 is characterized in that, this pendular body one injection molding.

3. the swing mechanism of bar code scanner as claimed in claim 1 or 2 is characterized in that, this pendular body is that the pliability material of a high elastic coefficient is made.

4. the swing mechanism of bar code scanner as claimed in claim 1 is characterized in that, the location division of this pendular body includes a fixed axis and a plastic hoop, and this plastic hoop fit is fixed on this fixed axis.

5. the swing mechanism of bar code scanner as claimed in claim 4 is characterized in that, the arm of turning round of the plastic hoop of the location division of this pendular body and this pendular body is one-body molded.

6. as the swing mechanism of claim 4 or 5 described bar code scanners, it is characterized in that the plastic hoop of the location division of this pendular body is that the pliability material of a high elastic coefficient is made.

7. the swing mechanism of bar code scanner as claimed in claim 1 is characterized in that, the frame of this pendular body includes a plastic frame and a framework, and this plastic frame is embedded in this framework.

8. the swing mechanism of bar code scanner as claimed in claim 7 is characterized in that, the arm of turning round of the plastic frame of the frame of this pendular body and this pendular body is one-body molded.

9. as the swing mechanism of claim 7 or 8 described bar code scanners, it is characterized in that the plastic frame of the frame of this pendular body is that the pliability material of a high elastic coefficient is made.

10. the swing mechanism of bar code scanner as claimed in claim 1, it is characterized in that, the magnetic element faying face of the frame of this pendular body more is formed with a location structure, and this magnetic element is positioned at the magnetic element faying face of this pendular body by this location structure.