CN2915797Y - The follower wheel fixing mechanism of the paper feeding device - Google Patents

Abstract

A driven wheel fixing mechanism is applied to a paper feeding device. The paper feeding device has at least one driven wheel and an axle rod, the axle rod is inserted into the driven wheel, and the driven wheel fixing mechanism includes a base, a top surface of the base is concavely provided with a receiving groove and a through hole, the receiving groove has a rear side wall, a bottom side wall and two opposite lateral walls, the bottom side wall and the rear side wall are adjacent to each other, and each lateral wall has a slide slot hole. The axle rod is inserted into the receiving groove through the two slide slot holes from the inside of the base, so that the driven wheel protrudes from the top surface through the through hole. An elastic component is provided between the axle rod and the rear side wall, so that the axle rod slides along the slide slot hole, and the elastic force generated by the elastic component is used to make the driven wheel constantly protrude from the top surface of the base through the through hole.

Description

The follower wheel fixing mechanism of the paper feeding device

technical field

The utility model relates to a paper feeding device, in particular to a driven wheel fixing mechanism applied in the paper feeding device.

Background technique

Due to the advancement of optoelectronic technology and the development of business, products such as printers, scanners, copiers and Multi-Function Peripherals (MFP) have spread from offices to personal homes and homes with low prices and practicality. The student group has gradually transformed into a word processing device used by the public in daily life.

The aforementioned devices such as printers, scanners, copiers, and multifunctional business machines all have a paper feeding device for sending paper documents to be processed to the work area for processing. Generally speaking, the paper feeding roller set of the paper feeding device has several driving wheels and driven wheels, which are arranged on two sides of the paper feeding track. The driving wheels can be driven by an external power source to transport the paper forward. The driven wheel can be used to cooperate with the driving wheel to sandwich the paper between the driving wheel and the driven wheel, so that enough friction is generated between the driving wheel and the paper to transmit the paper. The driven wheel can also be separately arranged on the side of the paper feeding track, so that the paper does not directly rub against the side of the paper feeding track, so that the paper can advance smoothly in the paper feeding track.

In view of the above requirements, the driven wheel must generate a positive force on the paper, so as to generate sufficient friction between the driving wheel and the paper, so that the driven wheel is driven by the paper to rotate. Therefore, a common method is to movably arrange the shaft of the driven wheel in the base of the paper feeding device, and push the shaft and the driven wheel through the elastic force of a spring. However, in the mounting structure of the driven wheel in the paper feeding device of the prior art, after the spring and the driven wheel are fixed by the inner surface of the base with a metal plate or a plastic plate, the plate is locked on the base, resulting in The manufacturing cost is increased and the assembly process is complicated.

As shown in FIG. 1 , in order to improve the above limitations, another follower wheel fixing structure 10 has been developed. As shown in the figure, the supporting part 11 is arranged on the paper feeding device and has an opening 12 on it, the shaft 13 passes through the opening 12 and is placed on the supporting part 11, and the driven wheel 14 is sleeved on the shaft 13, so as to In contact with the driving wheel (not shown in the figure) of the paper feeding device, the spring 15 is installed under the shaft 13, and is tightly against the shaft 13 to provide the positive force of the shaft 13, so that the driven roller 14 and the driving wheel wheel to make contact.

However, since the spring 15 is installed under the shaft 13, if the spring 15 needs to be installed and removed, the shaft 13 must be removed first, so that the fixed structure 10 of the driven wheel cannot be easily and quickly assembled and disassembled, and the assembly speed on the production line and the time for maintenance All will therefore be extended, and the production cost will be relatively increased.

And the installation position of the spring 15 in the fixed structure 10 of the driven wheel of the prior art cannot be adjusted, which may cause the positive force generated by the spring to mostly act in an invalid direction, resulting in poor performance of the spring and due to insufficient force. If the uniform force is applied to the shaft 13, it is easy to make the positive force exerted by the driven wheel 14 on the paper insufficient, so that the driven wheel 14 cannot be driven by the paper to rotate, and even a sliding friction state is formed between the driven wheel 14 and the paper, resulting in jamming. paper or damage the paper and crease it.

Contents of the invention

Due to the complicated assembly procedure of the driven wheel fixing structure 10 in the prior art paper feeding device, and the positive force generated by the driven wheel 14 on the paper is difficult to control, the effect of guiding the paper is not good. In view of the above problems, the purpose of the present invention is to provide a fixed structure for the driven wheel, which can simplify the assembly procedure and enable the driven wheel to generate sufficient positive force on the paper.

Therefore, in order to achieve the above purpose, a driven wheel fixing mechanism disclosed in the present invention is applied to a paper feeding device, and the paper feeding device has at least one driven wheel and a driven wheel shaft passing through the driven wheel. The fixed mechanism of the driven wheel of the utility model includes a base, and the shaft rod is arranged in the base, wherein a top surface of the base is concavely provided with an accommodating groove and a through hole, and the accommodating groove has a rear side wall, A bottom side wall and two opposite side walls, the bottom side wall and the rear side wall are adjacent to each other, and the side walls respectively have a chute hole, and the shaft rod of the driven wheel passes through the two chute holes, so that the driven wheel passes through the through hole. protruding from the top surface; and an elastic component, which is arranged in the accommodating groove. One end of the elastic component abuts against the driven wheel shaft of the paper feeding device, and the other end abuts against the rear side wall of the accommodating groove.

Wherein, the driven wheel fixing mechanism can protrude a post on the rear side wall, so that one end of the elastic component is sleeved on the post and leans against the rear side wall; The elastic component is clamped between the cover body and the bottom side wall.

The utility model has the functions of simplifying the assembly process of the driven wheel fixing mechanism, effectively providing the positive force between the paper and the roller, and reducing the cost.

The driven wheel fixing mechanism disclosed by the utility model can provide a positive force to the driven wheel only by installing the elastic component and the cover in the accommodation groove of the base, reducing the complexity of assembly and the required cost of the assembly process. time.

In the fixed mechanism of the driven wheel of the utility model, the direction in which the elastic component pushes against the shaft of the driven wheel is perpendicular to the direction in which the paper enters the top surface of the paper feeding device, and the extending direction of the chute hole on the side wall is perpendicular to the direction in which the paper passes through the top. Therefore, the positive force generated by the elastic component can fully act on the shaft of the driven wheel without generating invalid force components.

In order to have a further understanding of the purpose, structure, features, and functions of the present invention, the detailed description is as follows in conjunction with the embodiments.

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the utility model.

Description of drawings

FIG. 1 is a three-dimensional schematic diagram of a roller positioning structure of a paper feeding device in the prior art;

Figure 2 is an exploded schematic diagram of an embodiment of the utility model;

Fig. 3 is a partially enlarged and decomposed schematic diagram of an embodiment of the utility model;

Fig. 4 is a three-dimensional schematic diagram of an embodiment of the utility model;

Figure 5 is a cross-sectional side view of an embodiment of the present invention; and

Fig. 6 is a sectional side view of another embodiment of the present invention.

Among them, reference signs

10 fixed structure of driven wheel 11 support part

12 openings 13 shafts

14 driven wheel 15 spring

100 driven wheel fixing mechanism 110 base

111 top surface 112 through hole

120 driven wheel 121 shaft

130 storage tank 131 opening

132 rear side wall 132a boss

133 lateral wall 134 bottom side wall

135 chute hole 136 clamping slot hole

140 elastic component 150 cover body

151 hook

Detailed ways

According to the driven wheel fixing mechanism disclosed in the utility model, it can be applied to the paper feeding device of equipment such as fax machines, copiers, business machines or scanners, and in the following detailed description of the utility model, the automatic paper feeding device will be used As the best embodiment of the present utility model. However, the accompanying drawings are provided for reference and illustration only, and are not intended to limit the present invention.

Please refer to FIG. 2 and FIG. 3 , the driven wheel fixing mechanism 100 disclosed in an embodiment of the present invention is applied to a paper feeding device, and the paper feeding device has at least one driven wheel 120 and Shaft 121 . Taking the present utility model as an example, the paper feeding device of the present utility model has three driven wheels 120, and the shaft 121 is installed on the central axis of the three driven wheels 120 at the same time, so that the three driven wheels 120 are fixed on the shaft 121 form a linkage relationship.

The driven wheel fixing mechanism 100 includes a base 110 , several elastic components 140 and several covers 150 . Wherein, the base 110 corresponds to one side of the paper feeding track (not shown) of the paper feeding device, and the top surface 111 of the base 110 is recessed with one or more accommodating grooves 130 . Taking this embodiment as an example, the base 110 has two accommodating grooves 130, and each accommodating groove 130 has an opening 131, a rear side wall 132, two lateral walls 133 facing each other, and a bottom side wall 134. .

Wherein the rear side wall 132 is protrudingly provided with a boss 132a, and the two lateral walls 133 correspond to the opposite side edges of the opening 131, and each lateral wall 133 is provided with a chute hole 135 and a clamping slot 136 respectively, wherein the sliding The extending direction of the slot hole 135 is perpendicular to the direction of the paper passing through the top surface 111 , and the clamping slot hole 136 is connected with the sliding slot hole 135 . The shaft 121 is movably disposed in the base 110 , and passes through the accommodating groove 130 through the slot hole 135 , so that the shaft 121 can slide in the slot hole 135 along its radial direction. The rear sidewall 132 and the bottom sidewall 134 are adjacent to each other, and the bottom sidewall 134 is perpendicular to the moving direction of the paper.

The top surface 111 of the base 110 is provided with several through holes 112, corresponding to the driven wheels 120 respectively, so that when the shaft rod 121 passes through the accommodating groove 130 and is movably arranged in the base 110, the driven wheels 120 can A part is embedded in the base 110 , and the other part protrudes from the top surface 111 of the base 110 .

The number of elastic components 140 corresponds to the number of receiving slots 130 , which can be compression springs. Each accommodation groove 130 is provided with an elastic component 140, wherein one end of the elastic component 140 is sleeved on the boss 132a and leans against the rear side wall 132 of the accommodation groove 130, and the other end leans against the shaft rod 121 to provide A positive force makes the driven wheel 120 constantly protrude from the top surface 111 of the base 110 . In addition, since the extension direction of the protrusion 132a and the compressed direction of the elastic component 140 are perpendicular to the direction in which a piece of paper passes through the top surface 111, the direction in which the elastic component 140 pushes against the shaft 121 is also perpendicular to the direction in which a piece of paper passes through the top surface 111. , so that the positive force generated by the elastic component 140 can be completely applied to the shaft 121 without generating invalid force components.

Please refer to FIG. 4 and FIG. 5 at the same time. The number of covers 150 also corresponds to the number of accommodating slots 130 . Each cover 150 has two hooks 151 respectively, which can be inserted into the locking slots 136 of the two lateral walls 133 of the accommodating groove 130 to fix the cover to the opening 131 of the accommodating groove 130 . The cover body 150 and the bottom side wall 134 of the accommodating groove 130 can also jointly produce a limiting effect on the elastic component 140, so that the elastic component 140 is sandwiched between the two, so that the elastic component will not be deformed due to compression. The output direction is changed to avoid invalid force components.

As shown in Figure 6, the design of the boss 132a can also be omitted. Through the cooperation of the bottom side wall 134 and the cover body 150, the elastic component 140 is limited to a predetermined position without falling off, and its two ends abut against the rear The side wall 132 and the shaft 121 .

With the above combination, the driven wheel 120 can constantly apply an elastic force to the shaft 121 through the elastic component 140, and protrude from the top surface 111 of the base 110 through the through hole 112, so as to generate a positive direction to the paper passing through the top surface. The frictional contact relationship is formed between the paper and the driven wheel 120, and the driven wheel 120 is driven to rotate, so that the paper moves smoothly.

In addition, the driven wheel fixing mechanism 100 described in the present invention can install and disassemble the elastic component 140 without first disassembling the shaft rod 121, and the direction in which the elastic component 140 is compressed is perpendicular to the moving direction of the paper. The positive force generated by the elastic component 140 completely acts on the driven wheel 120 , reducing the generation of ineffective component force and improving the phenomenon of insufficient friction between the paper and the driven wheel 120 .

Of course, the utility model can also have other various embodiments, and those skilled in the art can make various corresponding changes and deformations according to the utility model without departing from the spirit and essence of the utility model, but These corresponding changes and deformations should all belong to the protection scope of the appended claims of the present utility model.

Claims (9)

1, a kind of flower wheel fixed mechanism of paper carrier is applied to a paper carrier, and this paper carrier has an at least one flower wheel and an axostylus axostyle, and this axostylus axostyle is located at the axle center of this flower wheel, it is characterized in that, this flower wheel fixed mechanism includes:

One pedestal, this axostylus axostyle is arranged among this pedestal, wherein an end face of this pedestal is concaved with a storage tank and an open-work, this storage tank has a rear wall, a downside wall and two relative lateral sidewalls, this downside wall and this rear wall are adjacent to each other, respectively this lateral sidewall has a chute hole respectively, and this axostylus axostyle passes in this two chute hole, makes this flower wheel protrude in this end face by this open-work; And

One elastic parts is arranged at this storage tank, and an end of this elastic parts is resisted against this axostylus axostyle, and the other end is resisted against the rear wall of this storage tank.

2, the flower wheel fixed mechanism of paper carrier according to claim 1 is characterized in that, this rear wall convexes with a projection, and an end of this elastic parts is sheathed on this projection and is resisted against this rear wall.

3, the flower wheel fixed mechanism of paper carrier according to claim 1 is characterized in that, also includes a lid, is covered in this storage tank, and this elastic parts is folded between this lid and this downside wall.

4, the flower wheel fixed mechanism of paper carrier according to claim 1 is characterized in that, this elastic parts is a compression spring.

5, the flower wheel fixed mechanism of paper carrier according to claim 1 is characterized in that, this elastic parts pushes against the direction of this axostylus axostyle, perpendicular to the direction of a paper by this end face.

6, the flower wheel fixed mechanism of paper carrier according to claim 1 is characterized in that, the bearing of trend of this chute hole is perpendicular to the direction of a paper by this end face.

7, the flower wheel fixed mechanism of paper carrier according to claim 1 is characterized in that, this downside wall is perpendicular to the direction of a paper by this end face.

8, the flower wheel fixed mechanism of paper carrier according to claim 1 is characterized in that, one of them offers a blocking slotted eye to these lateral sidewalls at least, this lid have one corresponding to this blocking slotted eye in order to embed the trip of this blocking slotted eye.

9, the flower wheel fixed mechanism of paper carrier according to claim 8 is characterized in that, this blocking slotted eye is connected with this chute hole.

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