Paper feeding mechanism of printer

Abstract

The utility model discloses a paper feeding mechanism of a printer. The paper feeding mechanism comprises a paper feeding mechanism fixing bottom plate, a lower paper inlet assembly, an upper paper inlet fixing support, an upper paper inlet assembly, a paper lifting plate and a spring pressing piece. The lower paper inlet assembly is installed at one end of the paper feeding mechanism fixing bottom plate, and the upper paper inlet assembly is fixed to the paper feeding mechanism fixing bottom plate through the upper paper inlet fixing support and located above the lower paper inlet assembly. Outlets of the upper paper inlet assembly and the lower paper inlet assembly intersect at one position; the paper lifting plate is hinged to the upper paper inlet fixing support, the spring pressing piece is fixed to the other end of the paper feeding mechanism fixing bottom plate, and the top end of the spring pressing piece makes contact with the bottom face of the paper lifting plate to provide lifting force for ascending of the paper lifting plate. The structure is simple, and the product reliability can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of printers, in particular to a paper feeding mechanism of a printer. Background Art

[0002] In printer products, the existing technology mostly uses two paper pickup rollers to achieve paper feeding from the upper and lower paper inlets. The structure is complex, and the lifting paper board is driven by a coil spring compressed to provide lifting force. After long-term use, the coil spring is easy to fall off, causing the lifting paper board to lose its paper lifting function and reduce product reliability. Utility Model Content

[0003] In view of this, the utility model provides a printer paper feeding mechanism, which has a simple structure and can improve product reliability.

[0004] The technical solutions adopted in this utility model are as follows:

[0005] A printer paper feed mechanism comprises a paper feed mechanism fixing base plate, a lower paper feed port assembly, an upper paper feed port fixing bracket, an upper paper feed port assembly, a lifting paper plate and a spring pressing piece;

[0006] The lower paper inlet assembly is installed at one end of the fixed base plate of the paper feeding mechanism, and the upper paper inlet assembly is fixed to the fixed base plate of the paper feeding mechanism through the upper paper inlet fixing bracket, and is located above the lower paper inlet assembly; the outlets of the upper paper inlet assembly and the lower paper inlet assembly intersect at one place; the paper lifting board is hinged on the upper paper inlet fixing bracket, and the spring pressing piece is fixed to the other end of the fixed base plate of the paper feeding mechanism, and the top of the spring pressing piece contacts the bottom surface of the paper lifting board to provide lifting force for the paper lifting board to rise.

[0007] Furthermore, the upper paper feed port fixing bracket is fixed to the paper feed mechanism fixing base plate by fixing screws.

[0008] Furthermore, the lower paper feed port assembly is installed on the fixed bottom plate of the paper feed mechanism through a snap-fit ​​structure, and the upper paper feed port assembly is installed on the upper paper feed port fixed bracket through a snap-fit ​​structure; at the same time, card slots are provided on both sides of the lower paper feed port assembly, which are snap-fitted and fixed with the bosses provided on both sides of the upper paper feed port assembly.

[0009] Furthermore, the spring pressing plate is a bent part, including a horizontal section and an inclined section. The horizontal section is fixed to the fixed base plate of the paper feeding mechanism by rivets. The top of the inclined section is arc-shaped, and the angle between the inclined section and the horizontal section is 140°. The length of the horizontal section is 1 / 5 of the total length of the spring pressing plate.

[0010] Furthermore, the top of the spring pressing piece is folded back, and the folded section is parallel to the inclined section.

[0011] Furthermore, the spring pressing sheet is made of spring steel, has a thickness of 1-1.5 mm and a width of 5 mm.

[0012] Beneficial effects:

[0013] 1. The utility model has a simple structure. The outlets of the upper paper feed assembly and the lower paper feed assembly are connected at one place, so that the upper and lower paper feeds share the same paper pickup roller. Secondly, a spring pressure piece is fixed to the fixed bottom plate of the paper feed mechanism to provide lifting force for the paper board, thereby improving product reliability.

[0014] 2. The upper paper inlet assembly and the lower paper inlet assembly of the utility model are both installed through a snap-fit ​​structure, and the assembly is quick and convenient.

[0015] 3. The top of the spring pressing piece of the utility model is arc-shaped, so that the contact point between it and the bottom surface of the lifting paper board moves smoothly without any jamming.

[0016] 4. The spring pressing piece of the utility model is made of spring steel with a thickness of 1-1.5mm and a width of 5mm, which can ensure the strength of the spring pressing piece to support the lifting paper board, and will not deform too much after putting paper in it to make it lose its supporting function. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 This is a schematic diagram of the overall structure of the utility model from another perspective.

[0019] Figure 3 It is a side view of the utility model.

[0020] Figure 4 This is a schematic diagram of the spring pressing piece structure of the utility model.

[0021] Figure 5 It is a bottom view of the utility model.

[0022] Figure 6 This is a schematic diagram of the fixed bottom plate structure of the paper feeding mechanism.

[0023] Figure 7 It is a schematic diagram of the structure of the lower paper feed port component.

[0024] Among them, 1-paper feed mechanism fixed base plate, 2-lower paper feed assembly, 3-upper paper feed fixing bracket, 4-upper paper feed assembly, 5-fixing screws, 6-lifting paper board, 7-spring pressure piece, 8-rivet, 9-slot hole, 10-positioning hole, 11-limiting platform, 12-card slot, 13-boss. DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0026] The utility model provides a printer paper feeding mechanism, comprising a paper feeding mechanism fixing base plate 1, a lower paper feed port component 2, an upper paper feed port fixing bracket 3, an upper paper feed port component 4, a lifting paper board 6 and a spring pressing piece 7.

[0027] like Figure 1 、 Figure 2 As shown, the lower paper inlet assembly 2 is installed at one end of the fixed base plate 1 of the paper feed mechanism, and the upper paper inlet assembly 4 is fixed to the fixed base plate 1 of the paper feed mechanism through the upper paper inlet fixing bracket 3, and is located above the lower paper inlet assembly 2; the upper paper inlet fixing bracket 3 is fixed to the fixed base plate 1 of the paper feed mechanism through fixing screws 5 on both sides; the outlets of the upper paper inlet assembly 4 and the lower paper inlet assembly 2 intersect at one place, which is the printer's paper pickup roller, and they share the same paper pickup roller, which rotates to complete the paper loading operation; the axis hole of the lifting paper board 6 is hinged to the corresponding hole on the upper paper inlet fixing bracket 3, and the spring pressure plate 7 is fixed to the other end of the fixed base plate 1 of the paper feed mechanism, and the top of the spring pressure plate 7 contacts the bottom surface of the lifting paper board 6, providing lifting force for the lifting paper board 6 to rise. As shown Figure 5 As shown, two spring pressing pieces 7 are provided on the fixed base plate 1 of the paper feeding mechanism.

[0028] like Figure 3 、 Figure 4 As shown, the spring pressing piece 7 is a bent part, including a horizontal section and an inclined section. The horizontal section is fixed to the fixed base plate 1 of the paper feeding mechanism by a rivet 8. The top of the inclined section is arc-shaped, and the angle between the inclined section and the horizontal section is 140°. The length of the horizontal section is 1 / 5 of the total length of the spring pressing piece 7, so that the spring pressing piece 7 has a certain resilience.

[0029] The spring pressing piece 7 is made of spring steel with a thickness of 1-1.5 mm and a width of 5 mm, so that the spring pressing piece 7 has sufficient strength to support the lifting paper board 6.

[0030] Preferably, the top of the spring pressing piece 7 is folded back to form an arc angle, so that the contact point between the top of the spring pressing piece 7 and the bottom surface of the lifting paper board 6 moves smoothly without any jamming. The folded section is parallel to the inclined section and fits on the back of the inclined section to avoid accidental injury.

[0031] As an improvement, the lower paper feed port assembly 2 is mounted on the paper feed mechanism fixed base plate 1 through a snap-fit ​​structure, and the upper paper feed port assembly 4 is mounted on the upper paper feed port fixed bracket 3 through a snap-fit ​​structure.

[0032] Specifically, if Figure 6As shown, a slotted hole 9 is provided on the fixed base plate 1 of the paper feed mechanism. The plane in which the slotted hole 9 is located is vertical (i.e., the slotted hole 9 is provided on a panel perpendicular to the bottom surface of the fixed base plate 1 of the paper feed mechanism). A corresponding stopper 11 is provided on the bottom surface of the lower paper feed port assembly 2. The stopper 11 extends from the slotted hole 9 and is engaged by a vertical panel of the fixed base plate 1 of the paper feed mechanism, preventing the stopper 11 from escaping from the slotted hole 9. At the same time, a positioning hole 10 is also provided on the bottom surface of the fixed base plate 1 of the paper feed mechanism, which is positioned with the cylindrical body on the bottom surface of the lower paper feed port assembly 2 through an axis hole.

[0033] The installation form of the snap-fit ​​structure between the upper paper inlet assembly 4 and the upper paper inlet fixing bracket 3 is consistent with the installation form of the snap-fit ​​structure between the lower paper inlet assembly 2 and the paper feeding mechanism fixing base plate 1 .

[0034] Preferably, if Figure 7 As shown, the lower paper feed port assembly 2 is provided with card slots on both sides, which are engaged and fixed with the bosses 13 provided on both sides of the upper paper feed port assembly 4.

[0035] Working Principle: Lower paper inlet assembly 2 is the general paper inlet with a large capacity, while upper paper inlet assembly 4 is the priority paper inlet with a small capacity. When printing paper is placed in both lower paper inlet assembly 2 and upper paper inlet assembly 4 at the same time, the paper in upper paper inlet assembly 4 is printed first.

[0036] After the paper is put into the lower paper feed assembly 2, the spring pressing piece 7 is deformed downward. When there is no paper in the upper paper feed assembly 4, after the printing task starts, the lower paper feed assembly 2 starts to work, the pickup roller rotates, and the paper is transported. The spring pressing piece 7 rebounds upward to ensure that the top paper in the lower paper feed assembly 2 is in good contact with the pickup roller, waiting for the next printing task.

[0037] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A printer paper feeding mechanism, characterized in that: It includes a paper feed mechanism fixing bottom plate, a lower paper feed port assembly, an upper paper feed port fixing bracket, an upper paper feed port assembly, a lifting paper board and a spring pressing piece; The lower paper inlet assembly is installed at one end of the fixed base plate of the paper feeding mechanism, and the upper paper inlet assembly is fixed to the fixed base plate of the paper feeding mechanism through the upper paper inlet fixing bracket, and is located above the lower paper inlet assembly; the outlets of the upper paper inlet assembly and the lower paper inlet assembly intersect at one place; the paper lifting board is hinged on the upper paper inlet fixing bracket, and the spring pressing piece is fixed to the other end of the fixed base plate of the paper feeding mechanism, and the top of the spring pressing piece contacts the bottom surface of the paper lifting board to provide lifting force for the paper lifting board to rise.

2. The printer paper feeding mechanism according to claim 1, wherein: The upper paper feed port fixing bracket is fixed to the paper feed mechanism fixing bottom plate by fixing screws.

3. The printer paper feeding mechanism according to claim 1, wherein: The lower paper feed port assembly is installed on the fixed bottom plate of the paper feed mechanism through a snap-fit ​​structure, and the upper paper feed port assembly is installed on the upper paper feed port fixed bracket through a snap-fit ​​structure; at the same time, card slots are provided on both sides of the lower paper feed port assembly, which are snap-fitted and fixed with the bosses provided on both sides of the upper paper feed port assembly.

4. The printer paper feeding mechanism according to claim 1, wherein: The spring pressing piece is a bent part, including a horizontal section and an inclined section. The horizontal section is fixed to the fixed base plate of the paper feeding mechanism by rivets. The top of the inclined section is arc-shaped, and the angle between the inclined section and the horizontal part is 140°. The length of the horizontal section is 1 / 5 of the total length of the spring pressing piece.

5. The printer paper feeding mechanism according to claim 4, wherein: The top of the spring pressing piece is folded back, and the folded section is parallel to the inclined section.

6. The printer paper feeding mechanism according to claim 4 or 5, characterized in that: The spring pressing sheet is made of spring steel, has a thickness of 1-1.5 mm and a width of 5 mm.

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