Mechanism for adjusting the paper width of a paper bin

Abstract

The utility model relates to the technical fields of thermal printer, it discloses adjustable paper bin paper width's clamping mechanism including baffle seat, locating sliding seat, guide sliding seat, middle shell and shell, shell is equipped with sliding convex part and locating convex part, middle shell is equipped with paper bin, locating sliding seat and guide sliding seat all are linked for sliding with paper bin, the upper end of locating sliding seat and the upper end of guide sliding seat all are connected with baffle seat, the bottom of locating sliding seat is linked for sliding with locating convex part, the bottom of guide sliding seat is linked for sliding with sliding convex part, locating convex part is equipped with locating recess, and the elastic locating block of locating sliding seat is positioned to locating recess. The utility model can adjust the width of paper bin to be suitable for different size printing paper easily, and can multistage equidistance positioning, under the vibration or impact load, baffle seat also can not be deflected, and simple structure, baffle seat can not appear deflection, greatly prolongs the service life of mechanism.

Description

Technical Field

[0001] This utility model relates to the technical field of thermal printers, and more particularly to a locking mechanism with an adjustable paper tray width. Background Technology

[0002] Currently, most printers have a fixed paper tray width, which only accommodates one type of paper width, limiting the printer's versatility. Some printers feature adjustable paper trays, but these are usually assembled from multiple components. These components require considerable installation space, and the manufacturing process is complex, making repairs difficult in case of malfunction. Another type of adjustable paper tray uses a single piece of plastic for the reset plate and the baffle body. A gap exists between the reset plate and the baffle body, requiring the reset plate to be pried towards the baffle body. This allows the positioning protrusion on the outer side of the reset plate to disengage from the positioning groove, enabling the entire baffle to be pulled out. However, excessive force can easily break the baffle body and the reset plate. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and to provide a positioning mechanism with an adjustable paper bin width.

[0004] The objective of this invention is achieved through the following technical solution: a locking mechanism with an adjustable paper tray width includes a baffle seat, a positioning sliding seat, a guide sliding seat, a middle shell, and an outer shell. The outer shell has a positioning protrusion and a sliding protrusion. The middle shell has a paper tray. The positioning sliding seat and the guide sliding seat are both slidably connected to the paper tray. The upper ends of the positioning sliding seat and the guide sliding seat are both connected to the baffle seat. The bottom of the positioning sliding seat is slidably connected to the positioning protrusion, and the bottom of the guide sliding seat is slidably connected to the sliding protrusion. The positioning protrusion has a positioning groove, which positions the elastic positioning block of the positioning sliding seat. This mechanism can easily adjust the width of the paper tray to suit different sizes of printing paper and can achieve multi-level positioning and locking. The baffle seat will not shift under vibration or impact loads.

[0005] A better alternative is that the positioning slide seat includes a first sliding boss, a first limiting base plate, a first baffle positioning post, and an elastic positioning block. Both the first sliding boss and the first baffle positioning post are connected to the first limiting base plate. Both the first limiting base plate and the first sliding boss have through holes. One end of the elastic positioning block is connected to the first limiting base plate, and the other end of the elastic positioning block is located in the through hole. The first sliding boss is slidably connected to the paper tray, and the first limiting base plate is slidably connected to the positioning boss. The first baffle positioning post is connected to the baffle seat by screws. This positioning slide seat can achieve multi-level positioning of the baffle seat, thus making it suitable for printing papers of different widths.

[0006] A better alternative is that the positioning protrusion includes a sliding protrusion and a positioning protrusion, with the positioning protrusion located between the sliding protrusions. The sliding protrusion is slidably connected to the first limiting base plate, and the positioning groove is disposed on the positioning protrusion. This positioning protrusion can press the positioning sliding seat to increase friction and perform equidistant positioning of the positioning sliding seat, thereby achieving baffle seat adjustment and preventing displacement.

[0007] A better option is that the positioning grooves are evenly distributed.

[0008] A better alternative is that the guide slide includes a second sliding boss, a second limiting base plate, and a second baffle positioning post. Both the second sliding boss and the second baffle positioning post are connected to the second limiting base plate. The second sliding boss is slidably connected to the paper tray, and the second limiting base plate is slidably connected to the sliding boss. The second baffle positioning post is connected to the baffle seat by screws. This guide slide is used to allow the baffle seat to slide and increases friction to prevent displacement due to vibration or impact loads.

[0009] A better option is that the sliding protrusion includes multiple sliding protrusions, which are parallel to each other and are all slidably connected to the second limiting base plate.

[0010] A better option is that the bottom of the paper tray is provided with a first guide groove and a second guide groove, the positioning sliding seat is slidably connected to the first guide groove, and the guide sliding seat is slidably connected to the second guide groove. The inner shell serves to guide the positioning sliding seat and the guide sliding seat.

[0011] A better option also includes an interface dust plug, which is installed on the middle shell.

[0012] This utility model has the following advantages and beneficial effects compared to the prior art:

[0013] This utility model features a simple locking mechanism with an adjustable paper tray width, which reduces production costs and assembly difficulty. The width of the paper tray can be adjusted and positioned simply by pushing the baffle seat. Under vibration or impact loads, the baffle seat is pressed and positioned by the outer shell and will not shift. Furthermore, there is no need to disassemble the baffle seat to adjust the width of the paper tray, thereby avoiding damage or loss of parts and greatly extending the service life of the mechanism. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the locking mechanism of the present invention, which has an adjustable paper bin width.

[0015] Figure 2 yes Figure 1 A magnified view of a portion at point A;

[0016] Figure 3 yes Figure 1 A magnified view of the area at point B;

[0017] Figure 4 This is an exploded view of the locking mechanism with adjustable paper bin width of this utility model;

[0018] Figure 5 This is an assembly diagram of the baffle seat, positioning sliding seat, and guide sliding seat of the present invention, which have adjustable paper bin width.

[0019] Figure 6 This is a schematic diagram of the positioning sliding seat of the carding mechanism with adjustable paper bin width of this utility model;

[0020] Figure 7 This is a schematic diagram of the positioning sliding seat of the carding mechanism with adjustable paper bin width of this utility model;

[0021] Figure 8 This is a schematic diagram of the guide sliding seat of the positioning mechanism with adjustable paper bin width of this utility model;

[0022] Figure 9 This is a schematic diagram of the guide sliding seat of the positioning mechanism with adjustable paper bin width of this utility model;

[0023] Figure 10 This is a schematic diagram of the middle shell of the locking mechanism with adjustable paper bin width of this utility model;

[0024] Figure 11 This is a schematic diagram of the outer shell of the locking mechanism with adjustable paper tray width of this utility model;

[0025] The components in the attached diagram are labeled as follows: 1-Baffle seat; 101-Positioning seat; 2-Positioning sliding seat; 201-First sliding boss; 202-First limiting base plate; 203-First baffle positioning post; 204-Elastic positioning block; 3-Guide sliding seat; 301-Second sliding boss; 302-Second limiting base plate; 303-Second baffle positioning post; 4-Middle shell; 401-Paper compartment; 402-First guide groove; 403-Second guide groove; 5-Outer shell; 51-Positioning protrusion; 511-Positioning protrusion; 5111-Positioning groove; 52-Sliding protrusion; 521-Sliding protrusion; 6-Interface dust plug; a-Horizontal transverse direction; b-Horizontal longitudinal direction. Detailed Implementation

[0026] The utility model objective of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the implementation of this utility model is not limited to the following embodiments.

[0027] Along the horizontal axis 'a', the arrow points to the right, and the opposite direction is to the left; along the horizontal axis 'b', the arrow points to the rear, and the opposite direction is to the front.

[0028] like Figures 1-5 As shown, the positioning mechanism with adjustable paper tray width includes a baffle seat 1, a positioning sliding seat 2, a guide sliding seat 3, a middle shell 4, an interface dust plug 6, and an outer shell 5. A paper tray 401 is mounted on the middle shell 4. The bottom of the paper tray 401 has a first guide groove 402 and a second guide groove 403 aligned with the axial direction of the paper tray 401. The positioning sliding seat 2 is slidably connected to the first guide groove 402, and the guide sliding seat 3 is slidably connected to the second guide groove 403. The outer shell 5 is connected to the middle shell 4 by screws. The outer shell 5 has a sliding protrusion 52 and a positioning protrusion 51 aligned with the axial direction of the paper tray 401. The positioning protrusion 51 is located within the first guide groove 402, and the sliding protrusion 52 is located within the second guide groove 403. The positioning sliding seat 2 can slide relative to the positioning protrusion 51, and the positioning protrusion 51 can equidistantly position the positioning sliding seat 2. The sliding protrusion 52 presses against the guide sliding seat 3 to increase friction and prevent displacement due to vibration or impact loads after positioning. The tops of the positioning slide seat 2 and the guide slide seat 3 are respectively connected to the two positioning seats 101 of the baffle seat 1 by screws. The interface dust plug 6 is installed at the right end of the middle shell 4.

[0029] The baffle seat 1 is used to limit the left and right movement of the printing paper. The positioning slide seat 2 is made of PP and cooperates with the positioning protrusion 51 of the outer shell 5 to achieve multi-level equidistant positioning. The guide slide seat 3 is made of PP and is used to elastically press against the sliding protrusion 52 of the outer shell 5 to prevent the baffle seat 1 from shifting due to vibration or impact load. The middle shell 4 is used to support the printing paper and guide the positioning slide seat 2 and the guide slide seat 3. The interface dust plug 6 is used to prevent dust from entering the printer. The outer shell 5 is used to equidistantly position the positioning slide seat 2 to achieve width adjustment and to elastically press against the guide slide seat 3 to prevent the guide slide seat 3 from shifting left and right in the horizontal direction.

[0030] like Figure 6 and 7 As shown, the positioning sliding seat 2 includes a first sliding boss 201, a first limiting base plate 202, a first baffle positioning post 203, and an elastic positioning block 204. The bottom of the first sliding boss 201 and the bottom of the first baffle positioning post 203 are both connected to the top of the first limiting base plate 202. The first sliding boss 201 is located to the left of the first baffle positioning post 203. The first sliding boss 201 is slidably connected to the first guide groove 402 of the middle shell 4. The first baffle positioning post 203 is connected to the first positioning seat 101 of the baffle seat. The bottom of the first limiting base plate 202 is slidably connected to the two sliding protrusions 521 of the positioning protrusion 511. The first baffle positioning post 203 is located to the right of the first sliding boss 201. A through hole is provided on the first sliding boss 201 and the first limiting base plate 202. The left end of the elastic positioning block 204 is connected to the first limiting base plate 202, and the right end of the elastic positioning block 204 is located in the through hole. The elastic positioning block 204 has a certain elasticity and corresponds to the positioning protrusion 51 of the outer shell 5. The first sliding boss 201 is slidably connected to the first guide groove 402 of the middle shell 4, and the first limiting base plate 202 is slidably connected to the positioning protrusion 51. The positioning protrusion 51 is equidistantly positioned on the elastic positioning block 204.

[0031] like Figure 8 and 9 As shown, the guide slide seat 3 includes a second sliding boss 301, a second limiting base plate 302, and a second baffle positioning post 303. The bottom of the second sliding boss 301 and the bottom of the second baffle positioning post 303 are both connected to the top of the second limiting base plate 302. The second sliding boss 301 is located to the left of the second baffle positioning post 303. The second sliding boss 301 is slidably connected to the second guide groove 403 of the middle shell 4, and the bottom of the second limiting base plate 302 is slidably connected to the sliding protrusion 52 of the outer shell 5. The second baffle positioning post 303 is connected to the second positioning seat 101 of the baffle seat 1 by screws.

[0032] like Figure 2 , 3As shown in Figures 10 and 11, the outer casing 5 is provided with a sliding protrusion 52 and a positioning protrusion 51. The positioning protrusion 51 includes one positioning ridge 511 and two sliding ridges 521. The axial directions of the two sliding ridges 521 and the positioning ridge 511 are the same as the axial direction of the paper tray 401. The positioning ridge 511 is located between the two sliding ridges 521. The sliding ridges 521 are slidably connected to the first limiting base plate 202 of the positioning sliding seat 2, and the positioning ridges 511 are equidistantly positioned on the elastic positioning block 204 of the positioning sliding seat 2. The sliding protrusion 52 includes three parallel sliding ridges 521. The axial directions of the three sliding ridges 521 are the same as the axial direction of the paper tray 401, and the three sliding ridges 521 are slidably connected to the second limiting base plate 302 of the guide sliding seat 3.

[0033] The working process of the positioning mechanism with adjustable paper tray width is described as follows: Push the baffle seat 1 to the right in the horizontal direction a. During this movement, the baffle seat 1 drives the positioning slide seat 2 to slide to the right on the first guide groove 402, and the guide slide seat 3 to slide to the right on the second guide groove 403. The elastic positioning block 204 of the positioning slide seat 2 moves up and down on the positioning protrusion 511 under its own elasticity and the action of the positioning groove 5111 of the positioning protrusion 511. Then, place the printing paper into the paper tray 401, and push the baffle seat 1 to the left, gradually approaching the right end of the printing paper. When pushing the baffle seat 1 to slide, the baffle seat 1 drives the positioning slide seat 2 to slide to the left on the first guide groove 402, and the guide slide seat 3 to slide to the left on the second guide groove 403. When the baffle seat 1 approaches the right end of the printing paper, the pushing of the baffle seat 1 stops, and the elastic positioning block 204 of the positioning slide seat 2 falls into one of the positioning grooves 5111 in the positioning protrusion 511, completing the width adjustment of the paper tray 401. The positioning groove 5111 is a concave arc surface. When the elastic positioning block 204 needs to move horizontally a, the elastic positioning block 204 needs to move upward. Its own elasticity increases the friction between the elastic positioning block 204 and the positioning protrusion 511. Therefore, without providing a pushing force, the elastic positioning block 204 is difficult to slide out of the positioning groove 5111. In addition, the sliding protrusion 521 has a certain friction force on the positioning slide seat 2 and the guide slide seat 3 respectively. Under the vibration or impact load of the printer, the baffle seat 1 will not shift, that is, the baffle seat 1 is locked.

[0034] The above-described specific embodiments are preferred embodiments of this utility model and are not intended to limit this utility model. Any other changes or equivalent substitutions made without departing from the technical solution of this utility model are included within the protection scope of this utility model.

Claims

1. A locking mechanism with an adjustable paper bin width, characterized in that: The assembly includes a baffle seat (1), a positioning slide seat (2), a guide slide seat (3), a middle shell (4), and an outer shell (5). The outer shell (5) is provided with a positioning protrusion (51) and a sliding protrusion (52). The middle shell (4) is provided with a paper tray (401). The positioning slide seat (2) and the guide slide seat (3) are both slidably connected to the paper tray (401). The upper ends of the positioning slide seat (2) and the upper ends of the guide slide seat (3) are both connected to the baffle seat (1). The bottom of the positioning slide seat (2) is slidably connected to the positioning protrusion (51). The bottom of the guide slide seat (3) is slidably connected to the sliding protrusion (52). The positioning protrusion (51) is provided with a positioning groove (5111). The positioning groove (5111) positions the elastic positioning block (204) of the positioning slide seat (2).

2. The positioning mechanism with adjustable paper bin width according to claim 1, characterized in that: The positioning sliding seat (2) includes a first sliding boss (201), a first limiting base plate (202), a first baffle positioning post (203), and an elastic positioning block (204). The first sliding boss (201) and the first baffle positioning post (203) are both connected to the first limiting base plate (202). The first limiting base plate (202) and the first sliding boss (201) are both provided with through holes. One end of the elastic positioning block (204) is connected to the first limiting base plate (202), and the other end of the elastic positioning block (204) is located in the through hole. The first sliding boss (201) is slidably connected to the paper tray (401), and the first limiting base plate (202) is slidably connected to the positioning protrusion (51). The first baffle positioning post (203) is connected to the baffle seat (1) by screws.

3. The positioning mechanism with adjustable paper bin width according to claim 2, characterized in that: The positioning protrusion (51) includes a sliding protrusion (521) and a positioning protrusion (511). The positioning protrusion (511) is located between the sliding protrusion (521). The sliding protrusion (521) is slidably connected to the first limiting base plate (202). The positioning groove (5111) is disposed on the positioning protrusion (511).

4. The positioning mechanism with adjustable paper bin width according to claim 3, characterized in that: The positioning grooves (5111) are evenly distributed.

5. The positioning mechanism with adjustable paper bin width according to claim 1, characterized in that: The guide sliding seat (3) includes a second sliding boss (301), a second limiting base plate (302), and a second baffle positioning post (303). The second sliding boss (301) and the second baffle positioning post (303) are both connected to the second limiting base plate (302). The second sliding boss (301) is slidably connected to the paper tray (401). The second limiting base plate (302) is slidably connected to the sliding protrusion (52). The second baffle positioning post (303) is connected to the baffle seat (1) by screws.

6. The positioning mechanism with adjustable paper bin width according to claim 5, characterized in that: The sliding protrusion (52) includes multiple sliding protrusions (521), which are parallel to each other, and all of the multiple sliding protrusions (521) are slidably connected to the second limiting base plate (302).

7. The positioning mechanism with adjustable paper bin width according to claim 1, characterized in that: The bottom of the paper tray (401) is provided with a first guide groove (402) and a second guide groove (403). The positioning sliding seat (2) is slidably connected to the first guide groove (402), and the guide sliding seat (3) is slidably connected to the second guide groove (403).

8. The positioning mechanism with adjustable paper bin width according to claim 1, characterized in that: It also includes an interface dust plug (6), which is installed on the middle shell (4).

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