Automatic push-out device for thermosensitive sheet tray of thermal printer

Abstract

The utility model relates to the field of thermal printers, and discloses an automatic push-out device for a thermal sheet tray of a thermal printer, which comprises a protective cover and a support frame, the support frame is fixed on the right side behind the protective cover, a rotating motor is assembled behind the support frame, a large assembling groove is arranged above the front end of the support frame, and the front end of the large assembling groove is provided with a rotating shaft. A rotating shaft is movably connected into the large assembling groove, and a driving wheel is fixed to the front end of the rotating shaft. According to the automatic push-out device for the thermosensitive sheet tray of the thermosensitive printer, a driving wheel is fixed to the front end of a rotating shaft, a rotating motor behind a supporting frame is started, the driving wheel is rotated through an output end fixedly connected with the rotating shaft, two silica gel rings are fixed to the surface of the driving wheel, and driven wheels are connected in series with two groups of small assembling grooves below through connecting shafts; when the driving wheel rotates forwards and backwards, the push rod can be guided to slide leftwards and rightwards, movement of the push rod is monitored through the in-out sensor, and the problem that the push rod moves unstably is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal printers, in particular to an automatic ejection device for a thermal sheet tray of a thermal printer. Background Art

[0002] A thermal printer is a device with a heating element installed on the surface of the print head. When the semiconductor is connected to power, the print head is heated so that it can fit the thermal printing paper to print patterns and texts. A certain temperature needs to be maintained to ensure the normal operation of thermal printing. In order to facilitate the movement of the thermal film, it is often pushed out with an automatic tray.

[0003] However, an ordinary tray is guided by only a single set of rollers and lacks a limiting structure. The tray is easily stuck when entering and exiting the thermal printer housing under the power of the push rod, and it is not conducive to the recovery of the push rod.

[0004] Now, a novel automatic ejection device for a thermal sheet tray of a thermal printer is proposed to solve the above problems. Utility Model Content

[0005] The utility model aims to provide an automatic ejection device for a thermal sheet tray of a thermal printer, so as to solve the problem of unstable movement of the ejector rod in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic ejection device for a thermal sheet tray of a thermal printer, comprising a protective cover and a support frame, a support frame is fixed to the right side behind the protective cover, and a rotating motor is installed at the rear of the support frame, a large assembly groove is arranged above the front end of the support frame, and a rotating shaft is movably connected in the large assembly groove, a driving wheel is fixed to the front end of the rotating shaft, and two groups of silicone rings are sleeved around the surface of the driving wheel, small assembly grooves are respectively arranged on both sides of the bottom of the front end of the support frame, and a connecting shaft is fixed at the center of the front end of the small assembly groove, a driven wheel is movably sleeved on the outer side of the connecting shaft, a stand is fixed to the front end of the left side of the support frame, and an in-and-out sensor is installed at the front end of the stand, and a push rod is horizontally inserted in the stand.

[0007] Preferably, the output end of the rotating motor is fixedly connected to a rotating shaft, and the rotating shaft can guide the driving wheel to rotate in situ.

[0008] Preferably, the driven wheels are symmetrically arranged on both sides of the bottom of the driving wheel, and the driving wheel and the driven wheel limit the translation of the push rod at upper and lower positions respectively.

[0009] Preferably, holes and grooves are respectively provided on the left side and the center of the push rod, and the in-and-out sensors are attached to the top and the bottom of the push rod.

[0010] Preferably, the front and rear ends of the protective cover are respectively provided with slots, a baffle is fixed on the right side of the front end of the protective cover, a side panel is fixed on the right side inside the protective cover, and a notch is provided at the center of the side panel, and the push rod and the notch are in the same horizontal plane.

[0011] Preferably, the push rod can move in and out of the slot left and right, and the length of the push rod is smaller than the protective cover.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the automatic ejection device for the thermal sheet tray of the thermal printer not only realizes the smooth movement of the push rod, realizes the movement of the limit push rod, but also realizes the protection of the transmission mechanism;

[0013] (1) By fixing a driving wheel at the front end of the rotating shaft, the rotating motor at the rear of the support frame is started, and the driving wheel is rotated by the output end fixedly connected to the rotating shaft. Because two silicone rings are fixed on the surface of the driving wheel, the two groups of small assembly grooves below are connected to the driven wheel through the connecting shaft. When the driving wheel rotates forward or reverse, it can guide the push rod to slide left and right, so as to push the tray in the thermal printer, and the movement of the push rod is monitored by the in-out sensor;

[0014] (2) By providing holes and grooves on the left side and the center of the push rod, the in-and-out sensor fixed on the surface of the stand can emit infrared rays, and the holes and grooves on the left side and the center of the push rod surface can be used for the infrared mechanism to detect whether there is an obstruction here, and then choose to stop or start the rotating motor, thereby ensuring the accuracy of the sliding of the moving push rod. If the infrared ray contacts the push rod, the object will continue to be moved;

[0015] (3) By fixing a baffle on the right side of the front end of the protective cover, a baffle for shielding the main transmission mechanism is installed on the right front of the protective cover to prevent important rotating parts such as the driving wheel and the driven wheel from getting stuck. The front and rear of the protective cover are respectively provided with transverse grooves to facilitate people to repair and adjust the push rod. The reserved groove on the right side is convenient for guiding the push rod in and out of the protective cover to avoid collision between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view structural schematic diagram of the utility model;

[0017] Figure 2 It is a front view cross-sectional structural schematic diagram of the utility model;

[0018] Figure 3 This is a schematic diagram of the front view structure of the driving wheel of the utility model;

[0019] Figure 4 For the utility model Figure 2 Schematic diagram of the enlarged structure of the local section at point A in the middle.

[0020] In the figure: 1. Protective cover; 2. Slot; 3. Push rod; 4. Hole slot; 5. Stand; 6. In / out sensor; 7. Rotating motor; 8. Support frame; 9. Baffle; 10. Large assembly slot; 11. Side panel; 12. Driven wheel; 13. Connecting shaft; 14. Small assembly slot; 15. Driving wheel; 16. Rotating shaft; 17. Silicone ring; 18. Notch. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example 1: Please refer to Figure 1-4 , a thermal printer thermal sheet tray automatic ejection device, comprising a protective cover 1 and a support frame 8, the support frame 8 is fixed to the right side behind the protective cover 1, and a rotating motor 7 is installed at the rear of the support frame 8, a large assembly groove 10 is arranged above the front end of the support frame 8, and a rotating shaft 16 is movably connected in the large assembly groove 10, a driving wheel 15 is fixed to the front end of the rotating shaft 16, and two groups of silicone rings 17 are sleeved around the surface of the driving wheel 15, small assembly grooves 14 are arranged on both sides of the bottom of the front end of the support frame 8, and a connecting shaft 13 is fixed at the center of the front end of the small assembly groove 14, and a driven wheel 12 is movably sleeved on the outer side of the connecting shaft 13, a vertical frame 5 is fixed to the front end of the left side of the support frame 8, and an in-out sensor 6 is installed at the front end of the vertical frame 5, and a push rod 3 is horizontally inserted in the vertical frame 5;

[0023] The output end of the rotating motor 7 is fixedly connected to the rotating shaft 16, and the rotating shaft 16 can guide the driving wheel 15 to rotate in situ. The driven wheels 12 are symmetrically arranged on both sides of the bottom of the driving wheel 15. The driving wheel 15 and the driven wheel 12 limit the translation of the push rod 3 at the upper and lower positions respectively;

[0024] Specifically, Figure 1 , Figure 2 and Figure 3 As shown, the rotating motor 7 behind the support frame 8 is started, and the driving wheel 15 is rotated by the output end fixedly connected to the rotating shaft 16. Since two silicone rings 17 are fixed on the surface of the driving wheel 15, the two groups of small assembly grooves 14 below are connected to the driven wheel 12 through the connecting shaft 13. When the driving wheel 15 rotates forward and reverse, it can guide the push rod 3 to slide left and right so as to push the tray in the thermal printer.

[0025] Embodiment 2: A hole groove 4 is provided at the left side and the center of the push rod 3, and the in-out sensor 6 is attached to the top and the bottom of the push rod 3;

[0026] Specifically, Figure 1 and Figure 2 As shown, the in-and-out sensor 6 fixed on the surface of the stand 5 can emit infrared rays, and holes 4 are respectively opened on the left side and the center of the surface of the push rod 3, so that the infrared mechanism can detect whether there is an obstruction here, and then choose to stop or start the rotating motor 7, so as to ensure the accuracy of the sliding of the mobile push rod 3.

[0027] Embodiment 3: The front and rear ends of the protective cover 1 are respectively provided with slots 2, a baffle 9 is fixed to the right side of the front end of the protective cover 1, a side plate 11 is fixed to the right side of the inside of the protective cover 1, and a notch 18 is provided at the center of the inside of the side plate 11, the push rod 3 and the notch 18 are in the same horizontal plane, the push rod 3 can enter and exit the notch 18 left and right, and the length of the push rod 3 is smaller than the protective cover 1;

[0028] Specifically, Figure 1 and Figure 4 As shown, a baffle 9 for shielding the main transmission mechanism is installed at the right front of the protective cover 1 to prevent important rotating parts such as the driving wheel 15 and the driven wheel 12 from getting stuck, and transverse grooves 2 are respectively provided at the front and rear of the protective cover 1 to facilitate people to repair and adjust the push rod 3. The notch 18 reserved on the right side is convenient for guiding the push rod 3 in and out of the protective cover 1 to avoid collision between the two, thereby realizing a protective push-out tray.

[0029] Working principle: When the utility model is used, first, the rotating motor 7 behind the support frame 8 is started, and the driving wheel 15 is rotated by the output end fixedly connected to the rotating shaft 16. Because two silicone rings 17 are fixed on the surface of the driving wheel 15, the two groups of small assembly grooves 14 below are connected to the driven wheel 12 through the connecting shaft 13. When the driving wheel 15 rotates forward and reverse, it can guide the push rod 3 to slide left and right, so as to push the tray in the thermal printer. The movement of the push rod 3 is monitored by the in-out sensor 6. In this process, the in-out sensor fixed on the surface of the stand 5 6 can emit infrared rays, and the left side and the center of the surface of the push rod 3 are respectively opened with hole grooves 4, which can be used for the infrared mechanism to detect whether there is an obstruction here, and then choose to stop or start the rotating motor 7. The right front of the protective cover 1 is equipped with a baffle 9 for blocking the main transmission mechanism to avoid the jamming of important rotating parts such as the driving wheel 15 and the driven wheel 12, and the front and rear of the protective cover 1 are respectively provided with transverse grooves 2 for people to repair and adjust the push rod 3. The notch 18 reserved on the right side is convenient for guiding the push rod 3 in and out of the protective cover 1 to avoid collision between the two.

[0030] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A device for automatically ejecting a thermal sheet tray of a thermal printer, comprising a protective cover (1) and a support frame (8), characterized in that: A support frame (8) is fixed on the right side of the rear of the protective cover (1), and a rotating motor (7) is installed at the rear of the support frame (8). A large assembly groove (10) is arranged above the front end of the support frame (8), and a rotating shaft (16) is movably connected in the large assembly groove (10). A driving wheel (15) is fixed at the front end of the rotating shaft (16), and two groups of silicone rings (17) are sleeved around the surface of the driving wheel (15). Small assembly grooves (14) are respectively arranged on both sides of the bottom of the front end of the support frame (8), and a connecting shaft (13) is fixed at the center of the front end of the small assembly groove (14), and a driven wheel (12) is movably sleeved on the outer side of the connecting shaft (13). A stand frame (5) is fixed at the front end of the left side of the support frame (8), and an in-out sensor (6) is installed at the front end of the stand frame (5), and a push rod (3) is horizontally inserted in the stand frame (5).

2. The automatic ejection device for thermal sheet tray of a thermal printer according to claim 1, characterized in that: The output end of the rotating motor (7) is fixedly connected to the rotating shaft (16), and the rotating shaft (16) can guide the driving wheel (15) to rotate in situ.

3. The automatic ejection device for thermal sheet tray of a thermal printer according to claim 1, characterized in that: The driven wheel (12) is symmetrically arranged on both sides of the bottom of the driving wheel (15), and the driving wheel (15) and the driven wheel (12) respectively limit the translation of the push rod (3) at upper and lower positions.

4. The automatic ejection device for a thermal sheet tray of a thermal printer according to claim 1, characterized in that: Holes (4) are respectively provided on the left side and the center of the push rod (3), and the in-and-out sensors (6) are attached to the top and the bottom of the push rod (3).

5. The automatic ejection device for thermal sheet tray of a thermal printer according to claim 1, characterized in that: The front and rear ends of the protective cover (1) are respectively provided with slots (2); a baffle (9) is fixed to the right side of the front end of the protective cover (1); a side plate (11) is fixed to the right side inside the protective cover (1); a notch (18) is provided at the center of the side plate (11); and the push rod (3) and the notch (18) are in the same horizontal plane.

6. The automatic ejection device for thermal sheet tray of a thermal printer according to claim 5, characterized in that: The push rod (3) can move in and out of the slot (18) to the left and right, and the length of the push rod (3) is shorter than the protective cover (1).

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