CN2774041Y - Elastic device for preventing from over stress deformation - Google Patents

Abstract

The utility model relates to an elastic device used for a transmission system of an image scanning device, which comprises a displacement component, a fixed component and an elastic component, wherein the fixed component is fixed on the image scanning device, the displacement component is combined with the fixed component, and a relative displacement travel route with a fixed distance is arranged between the displacement component and the fixed component; one end of the elastic component is connected with the displacement component, and the other end is connected with the fixed component. One end of the displacement component is connected with a transmission belt in the transmission system, so when the transmission belt pulls the displacement component, the displacement component can displace, and the elastic component can deforms; thus, the utility model has the efficiency that the elastic component can be prevented from overly deforming by the function of the relative displacement with a fixed distance of the displacement component and the fixed component.

Description

Prevent the elastic device of over-stressed distortion

Technical field

The utility model relates to a kind of elastic device, mainly be used in the drive system of device of image scanning such as scanner or multifunctional paper feeding machine, and this elastic device has the effect that prevents excessive deformation.

Background technology

With scanner or multifunctional paper feeding machine, its main composition assembly comprises casing, and group is located at the ray machine and the drive system of this casing inside.This drive system comprises driving belt, and this driving belt combines with this ray machine, and provides power to this ray machine, makes this ray machine to move back and forth.

One end of this driving belt more connects with an end of spring, and the other end of this spring then is installed on this casing.So the stress deformation by this spring can provide restoring force to this driving belt, makes this driving belt have stable tension force and moves to drive this ray machine.

Yet, because this spring one end links this driving belt, and the other end is fixed on the casing of this scanning means, so when this spring is subjected to the transmission force of this driving belt and produces elongation or during compression, deflection will extend or compress without restriction, thus, then can cause no recoverable permanent deformation if spring is over-stressed, the combination of this spring and this driving belt when the time comes can't provide stable tension to this ray machine.

The utility model content

The utility model is developed a kind of elastic device that prevents excessive deformation in view of the problem of above-mentioned existence, stablizes tension force to driving belt to provide, and makes moving that the ray machine that joins with this driving belt can be stable.

Further, main purpose of the present utility model is to limit the maximum deformation quantity of the elastic parts (for example spring) in this elastic device, and it is tired to prevent effectively that by this elastic parts from producing, and makes this driving belt have stable tension.

In order to reach the purpose of above-mentioned disclosed utility model, the technological means that the utility model used comprises:

The displacement component that can link belt.

Fixedly the fixation kit of shape is fixed on the casing of scanning means, make up in order to the displacement component with this, and there is fixing range in the relative motion between this displacement component and this fixation kit.

Elastic parts has first end and second end, and this first end is linked to this displacement component, and this second end is linked to this fixation kit.

Wherein this displacement component relatively the maximum displacement stroke of this fixation kit therefore can prevent this elastic parts because over-stressed and produce excessive deformation less than the elastic limit of this elastic parts, and then reach and make this driving belt have the effect of stable tension force.

In other words, because this displacement component and this fixation kit that the utility model disclosed link with elastic parts one end respectively, and the relative displacement stroke that has fixed range between this displacement component and this fixation kit, to limit this displacement component and the displacement of this elastic parts after stressed being pulled, therefore above-mentioned displacement can not surpass the elastic limit of elastic parts, so the ray machine of the stable and appropriate tension force of driving belt with driven sweep instrument or multifunctional paper feeding machine can be provided.

Description of drawings

Fig. 1 is the top plan view configuration schematic diagram that the utility model is arranged at scanner.

Fig. 2 is the stereogram of the utility model first embodiment.

Fig. 3 is the cross-sectional view of the utility model first embodiment.

Fig. 4 is one of action schematic diagram of the utility model first embodiment, in order to the stressed driving status of explanation elastic parts.

Fig. 5 be first kind of embodiment of the utility model the action schematic diagram two, in order to explanation elastic parts stressed driving status.

Fig. 6 is the stereogram of the utility model second embodiment.

Fig. 7 is the cross-sectional view of the utility model second embodiment.

Fig. 8 is the action schematic diagram of the utility model second embodiment, in order to the stressed driving status of explanation elastic parts.

Embodiment

The utility model is a kind of elastic device that prevents elastic parts because of stressed excessive deformation.Schematic diagram is assembled in scanner inside as shown in Figure 1, comprises the casing 10 of scanning means among the figure.Clearer and more definite, this casing 10 is meant the lower casing that is positioned at the below.Set ray machine 11 in this casing 10, and these casing 10 relative internal faces are provided with guide rod 12 at least to pass this ray machine 11, make that this ray machine 11 can moving axially along this guide rod 12.

These ray machine 11 bottom surfaces set driving belt 13 again, and these driving belt 13 1 ends are directly fixed on this casing 10, and the other end connects elastic device 20.It should be noted that this driving belt 13 belongs to drive system, by the driving of this drive system, this driving belt 13 can drive this ray machine 11 and move back and forth.

Shown in Fig. 2,3, this elastic device 20 comprises displacement component 30, fixation kit 50 and elastic parts 40.Wherein this displacement component 30 is shown as microscler plate kenel.These displacement component 30 surfaces are provided with hook sheet 31 and stroke hole 32.This hook sheet 31 be raised in this displacement component 30 the surface and and 32 in the trip hole at a distance of an intersegmental distance, the trip hole 32 then is an elongated hole.This displacement component 30 interosculates with an end and this driving belt 13 away from the trip hole 32 again.

This fixation kit 50 is shown as the column that vertically stands in these casing 10 bottom surfaces.The position that this fixation kit 50 is fixed in this casing 10 just can supply stroke hole 32 alignings of displacement component 30 insert, and so the relative displacement stroke between this displacement component 30 and this fixation kit 50 is limited within the magnitude range in the trip hole 32.

The preferable example that is positioned at this elastic parts 40 on this displacement component 30 is a spring, also can be other elastomeric material.This elastic parts 40 has first end 41 and second end 42, wherein this first end 41 is in order to be fitted in this hook sheet 31 on these displacement component 30 surfaces, this second end 42 then is fitted in this fixation kit 50, for example this second end 42 is locked on this fixation kit 50, makes the elastic telescopic direction of this elastic parts 40 be parallel to stroke hole 32 by a bolt 51.

As shown in Figure 1, when these ray machine 11 motions of these driving belt 13 pullings, or when this driving belt 13 of assembling and this elastic device 20, the tension force of this driving belt 13 is improved.Shown in Fig. 4,5, this moment, this driving belt 13 can spur this displacement component 30, and made this elastic parts 40 elongation strains.

Because this displacement component 30 is pulled synchronously with this elastic parts 40, so when these displacement component 30 relative these fixation kit 50 displacements, and the edge in this stroke hole 32 is when leaning on mutually with this fixation kit 50, and this displacement component 30 just can't move again.This moment, this elastic parts 40 also no longer continued elongation strain.

In other words, owing to have the function of limiting displacement stroke between the stroke hole 32 of this displacement component 30 and this fixation kit 50, so can ensure the maximum elongation stroke of this elastic parts 40 still remains in the elastic limit, though so this elastic parts 40 applied elongation distortion, but can prevent that this elastic parts 40 from producing permanent deformation, and then make this driving belt 13 keep stablizing tension force by this elastic device 20, stably drive this ray machine 11 and move.

According to above-mentioned technological means of the present utility model, another example structure is shown in Fig. 6,7, and elastic device 60 comprises displacement component 62, fixation kit 64, elastic parts 66.Wherein:

This displacement component 62 is shown as the major axis shape, has axial region 622, and forms the end 624 of external diameter greatly at these axial region 622 1 ends, makes this displacement component 62 present the shape of similar T oblique crank Z.

This elastic parts 66 is set in the axial region 622 of this displacement component 62.Above-mentioned elastic parts 66 is the spring or the elastomer of hollow tubular.

The hollow columnar of this fixation kit 64 for running through, wherein the vacancy is formed first pore chamber 642, second pore chamber 644 and the 3rd pore chamber 646 that links to each other and connect successively vertically by an end.The aperture maximum of this first pore chamber 642 wherein, take second place in the aperture of this second pore chamber 644, the aperture minimum of the 3rd pore chamber 646.This fixation kit 64 is installed in the wall of casing 10 with the outer face of this first pore chamber 642 again.

This displacement component 62 is assembled in this fixation kit 64 with the combination of this elastic parts 66.Wherein the axial region 622 of this displacement component 62 is penetrated by this first pore chamber 642, pass by the 3rd pore chamber 646, and with the part that passes the 3rd pore chamber 646 in conjunction with this driving belt 13.The two ends of this elastic parts 66 rest on the end 624 of this displacement component 62 and the abutted surface of this second pore chamber 644 the 3rd pore chamber 646 respectively again.It should be noted that after assembling and not stressed effect, the end 624 of this displacement component 62 and the end face of this second pore chamber 644 be from a segment distance D, and the length that designs above-mentioned distance D produces the decrement of permanent deformations less than this elastic parts 66.

As shown in Figure 8, stressed when this displacement component 62, this displacement component 62 is promptly to should fixation kit 64 and this elastic parts 66 is compressed in displacement simultaneously.Because the displacement of this displacement component 62 is subjected to the restriction of this distance D, so the deflection of this elastic parts 66 can not cause producing permanent deformation, prevent the over-stressed and effect of distortion of this elastic parts 66 so not only have, more can regulate the tension force of this driving belt 13 by this.

Concluding the design concept that prevents elastic parts 40 and 66 over-stressed distortion by above implementation is the two ends of this elastic parts 40 and 66 are organized respectively and is located at this fixation kit 50,64 and this displacement component 30,62, and between this displacement component 30,62 and this fixation kit 50,64, more establish the displacement stroke limiting mechanism, the corresponding matching configuration of stroke hole 32 and this fixation kit 50 for example, or the separation mutually between the end 624 of displacement component 62 and this second pore chamber 644 is from D, to limit the stroke of this displacement component 30,62.And because the path increment of this displacement component 30,62 is less than the elastic limit of this elastic parts 40,66, so can guarantee that this elastic parts 40,66 can be because of the over-stressed permanent deformation that produces.

The foregoing description only is illustrative technology of the present utility model and effect thereof, but not is used to limit the utility model.Any those of ordinary skill in the art are under the situation of know-why of the present utility model and spirit; the foregoing description is made amendment and changed; all should belong to equivalence of the present utility model in accordance with the law and implement, therefore protection range of the present utility model should be as the criterion with the content of this claim

Detailed description of main elements

10 casings, 11 ray machines

12 guide rods, 13 driving belts

20 elastic devices, 30 displacement components

31 hook sheets, 32 stroke holes

40 elastic parts, 41 first ends

42 second ends, 50 fixation kits

51 bolts, 60 elastic devices

62 displacement components, 622 axial regions

624 ends, 64 fixation kits

642 first pore chambers, 644 second pore chambers

646 the 3rd pore chambers, 66 elastic partss

Claims (10)

1. an elastic device that prevents over-stressed distortion is assembled in the casing of device of image scanning, and joins with the driving belt of drive system, it is characterized in that, comprising:

Fixation kit is installed in described casing;

Displacement component with the combination of described fixation kit, and joins with described driving belt, can described relatively fixation kit displacement after stressed;

Elastic parts is fitted between described fixation kit and the described displacement component, and described elastic parts one end combines with described displacement component, and the other end combines with described fixation kit;

The displacement stroke limiting mechanism, be formed between described displacement component and the described fixation kit, in order to limiting the displacement stroke of the described relatively fixation kit of described displacement component, and the displacement restriction amount between described displacement component and described fixation kit is less than the elastic limit of described elastic parts.

2. prevent the elastic device of over-stressed distortion according to claim 1, it is characterized in that, described displacement stroke limiting mechanism is meant on described displacement component surface offers the stroke hole, and described fixation kit one end passes described stroke hole, and the configuration by described stroke hole and described fixation kit limits the stroke of described displacement component and the deflection of described elastic parts.

3. prevent the elastic device of over-stressed distortion according to claim 1, it is characterized in that, described displacement stroke limiting mechanism is meant at described fixation kit axially penetratingly offers at least one pore chamber, and described displacement component group is located in the described pore chamber, and an end of described displacement component and described pore chamber end face are at a distance of a segment distance, move in described displacement component, the end of described displacement component is leaned on mutually with described pore chamber wall end face, with the stroke that limits described displacement component and the deflection of described elastic parts.

4. prevent the elastic device of over-stressed distortion according to claim 1, it is characterized in that described elastic parts is a spring.

5. an elastic device that prevents over-stressed distortion is assembled in the casing of device of image scanning, and joins with the driving belt of drive system, it is characterized in that, comprising:

Fixation kit vertically is installed in the bottom surface of described casing;

Displacement component is offered the stroke hole of a long hole shape in a surperficial end, and with described stroke borehole jack at described fixation kit, and the surperficial other end and described driving belt join, after stressed, described displacement component can described relatively fixation kit displacement;

Elastic parts, an end is fitted in described fixation kit, and the other end is fitted in described displacement component;

The stroke hole of described displacement component is enough to limit the displacement stroke of the relative described fixation kit of described displacement component with configuration between described fixation kit, and the elongation strain amount that limits described elastic parts.

6. as preventing the elastic device of over-stressed distortion as described in the claim 5, it is characterized in that described displacement component is microscler plate kenel.

7. as preventing the elastic device of over-stressed distortion as described in the claim 5, it is characterized in that described displacement component one end is provided with the hook sheet and uses for described elastic parts one end group and establish.

8. an elastic device that prevents over-stressed distortion is assembled in the casing of device of image scanning, and joins with the driving belt of drive system, it is characterized in that, comprising:

Fixation kit is installed in the wall of described casing, and its inner shaft is to offering the pore chamber that runs through and be class's structure;

Displacement component, group is established in the pore chamber of fixation kit, and the one end passes described pore chamber and described driving belt joins, and the other end forms the end face of the corresponding described pore chamber in end, can described relatively fixation kit displacement in stressed described displacement component afterwards;

Elastic parts, group are located at the axial of this displacement component, and the wall of an end and this pore chamber joins, and the end of the other end and this displacement component joins,

At a distance of a segment distance, make described displacement component displacement described displacement stroke of moving the described relatively fixation kit of assembly of configuration restriction by this and the compress variation that limits described elastic parts between the end of described displacement component and described pore chamber end face.

9. as preventing the elastic device of over-stressed distortion as described in the claim 8, it is characterized in that, the pore chamber of described fixation kit comprises first pore chamber, second pore chamber and the 3rd pore chamber of row in regular turn, and the aperture maximum of described first pore chamber, take second place in the aperture of described second pore chamber, the aperture minimum of described the 3rd pore chamber, and supply described displacement component one end to pass.

10. as preventing the elastic device of over-stressed distortion as described in the claim 9, it is characterized in that the formed outer end diameter of described displacement component one end is less than the aperture of described first pore chamber of described fixation kit and greater than the aperture of described second pore chamber.

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