Cutter fixing mechanism of thermal printer

Abstract

The utility model discloses a thermal printer cutter fixing mechanism which comprises an upper shell body, a transmission assembly and a pressing piece, a lower shell body is fixedly installed on the outer side of the upper shell body through screws, and an insert is fixedly installed in the middle of the lower end of the upper shell body; a transmission assembly is installed in the upper shell body. A pressing piece is fixedly installed in the lower shell body, a blade support is arranged on the outer side of the end, close to the lower shell body, of the pressing piece, and a blade body is fixedly installed on the outer side of the blade support. The utility model belongs to the technical field of thermal printer cutters, and aims at solving the problems that in the prior art, assembly of a whole blade body is tedious, the occupied area is large, and therefore the space and cost of a thermal printer are increased. The thermal printer blade has the advantages that the blade body can be conveniently assembled, the occupied area is reduced, and the space and cost of a thermal printer are saved.

Description

Technical Field

[0001] This application relates to the field of thermal printer cutter technology, specifically to a thermal printer cutter fixing mechanism. Background Technology

[0002] The thermal printer cutter is an important component of a thermal printer. Its function is to automatically cut the paper mechanically after printing to achieve the purpose of slitting. This cutting mechanism is particularly suitable for scenarios that require fast and efficient continuous printing and automatic paper cutting, such as supermarket receipt printing, restaurant ordering systems, and hospital prescription printing. The cutter cuts the paper mechanically.

[0003] However, most current thermal printers require the blade body to be fixed in the upper and lower sheet metal shells of the printer, and then components are designed below the cutting module to fix the printing roller. This makes the overall assembly of the blade body cumbersome and takes up a large area, thereby increasing the space and cost of thermal printers, and thus has certain drawbacks. Utility Model Content

[0004] Therefore, this application provides a thermal printer cutter fixing mechanism to solve the problem that the existing assembly of the blade body is cumbersome and occupies a large area, thereby increasing the space and cost of thermal printers.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A thermal printer cutter fixing mechanism includes an upper shell body, a transmission assembly and a pressure plate. A lower shell body is fixedly installed on the outer side of the upper shell body by screws, and an insert is fixedly installed at the lower middle part of the upper shell body.

[0007] The upper shell body is equipped with a transmission component;

[0008] A pressure plate is fixedly installed inside the lower shell body, and a blade bracket is provided on the outer side of one end of the pressure plate near the lower shell body. The blade body is fixedly installed on the outer side of the blade bracket.

[0009] Furthermore, the transmission assembly includes a motor, a worm gear, a worm wheel, and a retaining ring. The motor is fixedly installed on the lower inner side of the upper shell body by screws, and the output end of the motor is connected to the worm gear.

[0010] Furthermore, a worm wheel is connected to the outer side of the lower end of the worm, and the worm wheel is installed in the middle of the lower end of the upper shell body, with the insert being installed through the middle of the worm wheel.

[0011] Furthermore, a retaining ring is installed at the front end of the connection between the worm gear and the insert, and a pin is fixedly installed on the edge of the worm gear near the lower housing body.

[0012] Furthermore, a micro switch located outside the worm gear is fixedly installed on the inner side of the upper shell body by screws, and a protrusion is provided on the side of the worm gear close to the upper shell body.

[0013] Furthermore, a grounding terminal is fixedly installed inside the pressure plate by screws.

[0014] Furthermore, a transverse groove is provided in the middle of the blade holder, and the pin extends into the interior of the transverse groove.

[0015] Compared with the prior art, this application has at least the following beneficial effects:

[0016] 1. By placing the blade holder with the blade body flat on the surface of the lower housing body, the protrusion of the blade holder is in the guide groove on the surface of the lower housing body, which drives the blade body to only reciprocate, thus enabling the blade body to be assembled more conveniently. The pressure plate is directly fixed to the surface of the lower housing body with screws, and the grounding terminal is also fixed to the pressure plate with screws to achieve the fixed work. In addition, the space for assembling internal parts of the lower housing body is optimized, reducing the overall space occupied in the thermal printer.

[0017] 2. By making both the upper and lower shells plastic, and providing locking screw holes on both sides, the upper shell replaces the sheet metal function of the upper shell in the prior art, and the lower shell replaces the sheet metal function of the lower shell in the prior art. Furthermore, by replacing both the sheet metal upper and lower shells with plastic parts, the rubber roller can be directly fixed to the plastic parts, and the overall assembly space is optimized. Therefore, the overall space of the thermal printer is simplified, and the cost of the thermal printer is saved.

[0018] 3. A pin is fixedly installed on one side edge of the worm gear near the lower shell body. A transverse groove is opened in the middle of the blade bracket, and the pin extends into the inside of the transverse groove. The pin is inserted into the transverse groove of the blade bracket. When the worm gear rotates, the pin of the worm gear reciprocates in the transverse groove of the blade bracket, thereby driving the blade body to extend and retract, realizing the paper cutting function of the cutting system. Attached Figure Description

[0019] To more intuitively illustrate the prior art and this application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concept disclosed in this application and the exemplary drawings, those skilled in the art are capable of making conventional adjustments or further optimizations to the addition / reduction / classification of certain units, their specific shapes, positional relationships, connection methods, size ratios, etc.

[0020] Figure 1 A schematic diagram of the overall structure of a thermal printer cutter fixing mechanism provided in one embodiment of this application;

[0021] Figure 2 This application provides an exploded view of the overall structure of a thermal printer cutter fixing mechanism according to one embodiment of the present application.

[0022] Figure 3 An exploded view of the overall structure of a thermal printer cutter fixing mechanism provided in one embodiment of this application;

[0023] Figure 4 A schematic diagram of the overall structure of the upper shell body and connection of a thermal printer cutter fixing mechanism provided in one embodiment of this application;

[0024] Figure 5 A front cross-sectional view of the worm gear and worm wheel connection of a thermal printer cutter fixing mechanism provided in one embodiment of this application;

[0025] Figure 6 This is a front cross-sectional view of the connection between the upper housing and the motor of a thermal printer cutter fixing mechanism according to an embodiment of this application.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Upper shell body; 2. Lower shell body; 3. Micro switch; 4. Motor; 5. Worm gear; 6. Worm wheel; 7. Snap ring; 8. Grounding terminal; 9. Pressure plate; 10. Blade holder; 11. Blade body; 12. Insert. Detailed Implementation

[0028] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figures 1 to 6 As shown, a thermal printer cutter fixing mechanism in the first aspect embodiment of this application includes: an upper shell body 1, a transmission assembly and a pressure plate 9. A lower shell body 2 is fixedly installed on the outer side of the upper shell body 1 by screws, and an insert 12 is fixedly installed at the lower middle part of the upper shell body 1.

[0030] The upper shell body 1 and the lower shell body 2 are both made of plastic. The upper shell body 1 is used to fix the micro switch 3, the motor 4 and the worm gear 6. The lower shell body 2 is used to install the grounding terminal 8, the pressure plate 9 and the blade body 11. The grounding terminal 8 is fixedly installed inside the pressure plate 9 by screws. The grounding terminal 8 is fixed with a grounding wire, and the static electricity on the blade body 11 is discharged to the outside of the system through the grounding wire.

[0031] Meanwhile, the insert 12 is installed through the middle of the worm gear 6. A retaining ring 7 is installed at the front end of the connection between the worm gear 6 and the insert 12. The front end of the insert 12 has a retaining groove. The hole in the middle of the worm gear 6 passes through the insert 12. Then the retaining ring 7 fixes the worm gear 6 to the insert 12 through the retaining groove, so that the worm gear 6 can rotate around the insert 12.

[0032] The upper shell body 1 is equipped with a transmission assembly, which includes a motor 4, a worm gear 5, a worm wheel 6 and a retaining ring 7. The motor 4 is fixedly installed on the lower inner side of the upper shell body 1 by screws, and the output end of the motor 4 is connected to the worm gear 5. The lower outer side of the worm gear 5 is connected to the worm wheel 6, and the worm wheel 6 is installed in the middle of the lower end of the upper shell body 1.

[0033] Among them, the motor 4 is the power source of the whole, providing power for the rotation of the worm 5. The worm 5 is fixed on the shaft of the motor 4 and rotates with the rotation of the motor 4. At the same time, the worm 5 meshes with the worm wheel 6, and the rotation of the worm 5 drives the rotation of the worm wheel 6.

[0034] Meanwhile, a micro switch 3 located outside the worm gear 6 is fixedly installed on the inner side of the upper shell body 1 by screws, and a protrusion is provided on the side of the worm gear 6 near the upper shell body 1. The micro switch 3 is fixed on the upper shell body 1 by screws, and the contacts of the micro switch 3 can contact the protrusion of the turbine. The contact and separation between the protrusion and the micro switch 3 are used to determine the movement state of the turbine.

[0035] A pin is fixedly installed on one side edge of the worm gear 6 near the lower housing body 2. A transverse groove is opened in the middle of the blade support 10, and the pin extends into the interior of the transverse groove.

[0036] The pin is inserted into the transverse groove of the blade holder 10. When the worm gear 6 rotates, the pin of the worm gear 6 reciprocates in the transverse groove of the blade holder 10, thereby driving the blade body 11 to extend and retract, realizing the paper cutting function of the cutting system.

[0037] A pressure plate 9 is fixedly installed inside the lower shell body 2, and a blade support 10 is provided on the outer side of the end of the pressure plate 9 near the lower shell body 2. A blade body 11 is fixedly installed on the outer side of the blade support 10.

[0038] The pressure plate 9 is made of elastic metal and is used to fix the blade. The pressure plate 9 is fixed to the lower housing body 2 by screws, pressing down on the blade support 10 and the blade body 11, so that the blade body 11 slides under the pressure plate 9.

[0039] Meanwhile, the bottom of the blade holder 10 has a protrusion. When the blade body 11 is placed, the protrusion of the blade holder 10 is embedded in the longitudinal groove of the lower shell body 2. When the pin of the worm gear 6 reciprocates in the transverse groove, it drives the blade body 11 to reciprocate, so that the blade holder 10 can realize the function of cutting paper for the printer.

[0040] Working principle

[0041] First, the micro switch 3 is directly fixed to the surface of the upper shell body 1 with screws. The insert 12 inside the upper shell body 1 passes through the hole in the middle of the worm gear 6. The retaining ring 7 can fix the worm gear 6 in the annular groove of the insert 12. The motor 4 is directly fixed to the surface of the upper shell body 1 with screws, thereby replacing the function of the upper shell sheet metal in the prior art and optimizing the overall assembly space.

[0042] Simultaneously, the blade holder 10, which contains the blade body 11, is placed flat on the surface of the lower shell body 2. The protrusion of the blade holder 10 is in the guide groove on the surface of the lower shell body 2, causing the blade body 11 to only reciprocate. The pressure plate 9 is directly fixed to the surface of the lower shell body 2 by screws, and the grounding terminal 8 is also fixed to the pressure plate 9 by screws, thus achieving the fixing work and replacing the function of the lower shell sheet metal in the prior art. Then, the screws are rotated into the locking screw holes opened on the sides of the upper shell body 1 and the lower shell body 2 respectively, and the upper shell body 1 and the lower shell body 2 are assembled, realizing the clamping and fixing work. This eliminates the sheet metal upper shell and sheet metal lower shell in the prior art. Both the sheet metal upper shell and sheet metal lower shell are replaced with plastic parts, so that the rubber roller can be directly fixed on the plastic parts, and the overall assembly space is optimized. Therefore, the overall space of the thermal printer is simplified, and the cost of the thermal printer is saved.

[0043] When the motor 4 is started, the worm 5 drives the worm wheel 6 to rotate, and the pin moves in a circular motion around the center of the worm wheel 6. At the same time, the pin moves in the transverse groove of the blade holder 10. At this time, since the protrusion of the blade holder 10 is in the guide groove of the lower shell body 2, the blade holder 10 can only drive the blade body 11 to reciprocate between the lower shell body 2 and the pressure plate 9, thereby realizing the paper cutting action of the blade body 11.

[0044] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A thermal printer cutter fixing mechanism, comprising an upper housing body (1), a transmission assembly, and a pressure plate (9), characterized in that, The lower shell body (2) is fixedly installed on the outside of the upper shell body (1) by screws, and an insert (12) is fixedly installed at the middle of the lower end of the upper shell body (1). A transmission assembly is installed inside the upper shell body (1); A pressure plate (9) is fixedly installed inside the lower shell body (2), and a blade bracket (10) is provided on the outer side of one end of the pressure plate (9) near the lower shell body (2). A blade body (11) is fixedly installed on the outer side of the blade bracket (10).

2. The thermal printer cutter fixing mechanism according to claim 1, characterized in that, The transmission assembly includes a motor (4), a worm (5), a worm wheel (6), and a snap ring (7). The motor (4) is fixedly installed on the lower inner side of the upper shell body (1) by screws, and the output end of the motor (4) is connected to the worm (5).

3. The thermal printer cutter fixing mechanism according to claim 2, characterized in that, The lower outer side of the worm (5) is connected to a worm wheel (6), and the worm wheel (6) is installed in the middle of the lower end of the upper shell body (1). The insert (12) is installed through the middle of the worm wheel (6).

4. The thermal printer cutter fixing mechanism according to claim 3, characterized in that, A retaining ring (7) is installed at the front end of the connection between the worm gear (6) and the insert (12), and a pin is fixedly installed on one side edge of the worm gear (6) near the lower shell body (2).

5. A thermal printer cutter fixing mechanism according to claim 1, characterized in that, The inner side of the upper shell body (1) is fixedly installed with a micro switch (3) located outside the worm gear (6) by screws, and the worm gear (6) has a protrusion on the side close to the upper shell body (1).

6. The thermal printer cutter fixing mechanism according to claim 1, characterized in that, The grounding terminal (8) is fixedly installed inside the pressure plate (9) by screws.

7. A thermal printer cutter fixing mechanism according to claim 1, characterized in that, The blade holder (10) has a transverse groove in the middle, and the pin extends into the interior of the transverse groove.

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