Cover-clamping-free gear structure

Abstract

The utility model relates to the technical field of printing equipment, and discloses a cover-clamping-free gear structure which comprises a main rack, a turning cover is movably hinged to one side of the top end of the main rack, a rubber roller body is movably installed on one side of the bottom end of the turning cover, a rubber roller gear is installed at one end of the rubber roller body, and a printer head is installed in the main rack. A first gear is installed at one end of the printer head, a movable gear is arranged at one end of the first gear, and a second gear is arranged below the movable gear. According to the non-cover-clamping gear structure, the space for containing the torsional spring is formed between the large gear and the small gear, under the action of the force of the torsional spring, the first rotating block is attached to the second rotating block, a certain relative rotating angle is formed between the second rotating block and the first rotating block, the problem that the gear is damaged due to hard extrusion can be avoided, and the service life of the gear structure is prolonged. And the movable gear is arranged on any ring in the transmission chain of the main engine gear set, so that the same effect can be achieved, and the problem that the gear is easily damaged by the box cover is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of printing equipment, in particular to a non-stuck gear structure. Background Art

[0002] Label printers are usually composed of two parts: a main unit and a flap, which is hinged to the main unit. In some printer structures, the print head is set inside the main unit and placed vertically, and the rubber roller is hinged to the flap. When the flap is buckled with the main unit, the rubber roller is horizontally or vertically pressed against the print head to print. In this structure, a rubber roller gear is provided at one end of the rubber roller. After the cover is closed, the rubber roller gear is connected to the power transmission group set in the main unit to rotate and drive the paper to print.

[0003] After searching, it was found that when the label printer closes its cover, the rubber roller first contacts the vertically placed print head and presses on the print head. At this time, the rubber roller is clamped between the flip cover and the print head and loses its freedom. The main engine gear set is connected to the motor and has a large transmission ratio. It can be roughly considered that the transmission end of the main engine gear set is fixed. When the gear at the end of the rubber roller meshes with the gear set on the main engine, there is assembly interference between the two, and forcing the installation into place is likely to damage the gear.

[0004] There is an urgent need for a non-stuck gear structure to solve the technical defects proposed in the above technology. Utility Model Content

[0005] The utility model aims to provide a gear structure without cover jamming, so as to solve the problem that the box cover is easy to damage the gear in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a non-stuck gear structure, comprising a main frame, a flip cover movably hinged on one side of the top of the main frame, a rubber roller body movably mounted on one side of the bottom of the flip cover, a rubber roller gear mounted on one end of the rubber roller body, a printer head mounted inside the main frame, a first gear mounted on one end of the printer head, a movable gear disposed on one end of the first gear, and a second gear disposed below the movable gear;

[0007] The movable gear comprises a large gear and a small gear, the interior of the large gear is fixedly connected with a first rotating block, the exterior of the small gear is fixedly connected with a second rotating block, and a torsion spring is installed between the large gear and the small gear.

[0008] Preferably, the pinion is embedded in the large gear, one end of the torsion spring is engaged with the large gear, and the other end is engaged with the pinion.

[0009] Preferably, the first rotating blocks and the second rotating blocks are each provided in three groups, and the second rotating blocks are embedded between the first rotating blocks.

[0010] Preferably, the bottom end of the rubber roller gear can be meshedly connected with the top end of the first gear.

[0011] Preferably, one side of the first gear is meshingly connected with one side of the pinion gear.

[0012] Preferably, the large gear is meshingly connected with the second gear.

[0013] Compared with the prior art, the beneficial effects of the utility model are: the gear structure without cover jamming realizes the function of preventing cover jamming;

[0014] (1) By providing a movable gear, a first rotating block, a large gear, a second rotating block, a torsion spring and a small gear, the flip cover of the printing device can be covered on the top of the main frame, the rubber roller body at the bottom of the flip cover contacts the printer head, the rubber roller body is pressed together with the printer head, and after the rubber roller body is pressed together, the rubber roller gear can drive the gear rotating group to rotate, a space for accommodating a torsion spring is provided between the large gear and the small gear, one end of the torsion spring is clamped with the large gear, and the other end is clamped with the small gear. Under the action of the torsion spring force, the first rotating block is fitted with the second rotating block, and the second rotating block has a certain relative rotation angle with the first rotating block, which can avoid the problem of gear being hard squeezed and damaged, and the movable gear can be provided in any link of the transmission chain of the main gear group to achieve the same effect; BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view cross-sectional structural schematic diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the large gear structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the pinion structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the movable gear structure of the utility model.

[0019] In the figure: 1. main frame; 2. flip cover; 3. rubber roller gear; 4. rubber roller body; 5. printer head; 6. first gear; 7. movable gear; 8. second gear; 9. first rotating block; 10. large gear; 11. second rotating block; 12. torsion spring; 13. small gear. DETAILED DESCRIPTION

[0020] 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.

[0021] Example 1: Please refer to Figure 1-4 , a non-stuck gear structure, comprising a main frame 1, a flip cover 2 is movably hinged on one side of the top of the main frame 1, a rubber roller body 4 is movably installed on one side of the bottom end of the flip cover 2, a rubber roller gear 3 is installed on one end of the rubber roller body 4, a printer head 5 is installed inside the main frame 1, a first gear 6 is installed on one end of the printer head 5, a movable gear 7 is arranged on one end of the first gear 6, and a second gear 8 is arranged below the movable gear 7;

[0022] The movable gear 7 includes a large gear 10 and a small gear 13. The inside of the large gear 10 is fixedly connected to a first rotating block 9, the outside of the small gear 13 is fixedly connected to a second rotating block 11, and a torsion spring 12 is installed between the large gear 10 and the small gear 13;

[0023] The pinion 13 is embedded in the large gear 10, one end of the torsion spring 12 is clamped with the large gear 10, and the other end is clamped with the pinion 13, the first rotating block 9 and the second rotating block 11 are both provided with three groups, and the second rotating block 11 is embedded between the first rotating blocks 9;

[0024] Specifically, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the flip cover 2 of the printing device can be covered on the top of the main frame 1, and the rubber roller body 4 at the bottom of the flip cover 2 is in contact with the printer head 5, and the rubber roller body 4 is pressed together with the printer head 5. After the rubber roller body 4 is pressed together, the rubber roller gear 3 can drive the gear rotating group to rotate, and a space for accommodating a torsion spring 12 is provided between the large gear 10 and the small gear 13. One end of the torsion spring 12 is engaged with the large gear 10, and the other end is engaged with the small gear 13. Under the action of the torsion spring 12, the first rotating block 9 is fitted with the second rotating block 11, and the second rotating block 11 has a certain relative rotation angle with the first rotating block 9, which can avoid the problem of gear being damaged by hard extrusion, and the movable gear 7 can achieve the same effect in any link of the main gear group transmission chain.

[0025] Embodiment 2: The bottom end of the rubber roller gear 3 can be meshed with the top end of the first gear 6, one side of the first gear 6 is meshed with one side of the small gear 13, and the large gear 10 is meshed with the second gear 8;

[0026] Specifically, Figure 1 and Figure 4 As shown, the first gear 6 drives the small gear 13 to rotate, the second rotating block 11 on the small gear 13 pushes the first rotating block 9 to drive the large gear 10 to rotate, and the large gear 10 drives the second gear 8 to rotate. A space for accommodating a torsion spring 12 is provided between the large gear 10 and the small gear 13. One end of the torsion spring 12 is clamped with the large gear 10, and the other end is clamped with the small gear 13. Under the action of the torsion spring 12, the first rotating block 9 and the second rotating block 11 fit together.

[0027] Working principle: When the utility model is in use, when the printing device is pressed and closed, the flip cover 2 can cover the top of the main frame 1, and the rubber roller body 4 at the bottom of the flip cover 2 contacts the printer head 5, and the rubber roller body 4 is pressed with the printer head 5. After the rubber roller body 4 is pressed, the rubber roller gear 3 can contact and mesh with the first gear 6, and the rubber roller gear 3 drives the first gear 6 to rotate, and the first gear 6 drives the small gear 13 to rotate. At this time, the second rotating block 11 of the small gear 13 is separated from the first rotating block 9 of the large gear 10, so that the rubber roller gear 3 can easily cut into and mesh with the first gear 6 (the cutting torque of the rubber roller gear 3 is not transmitted to the large gear 10 and the second gear 8, otherwise the cover will be stuck), and a space for accommodating a torsion spring 12 is provided between the large gear 10 and the small gear 13, and one end of the torsion spring 12 is connected to the large gear 1 0 is engaged, and the other end is engaged with the small gear 13. Under the action of the torsion spring 12, the first rotating block 9 is fitted with the second rotating block 11. When the cover is closed, the rubber roller gear 3 cuts into the gear group for meshing, and the second rotating block 11 advances an angle and disengages from the first rotating block 9; when the cover is opened, the rubber roller gear 3 is withdrawn from the gear group for meshing, and the second rotating block 11 retreats an angle and fits with the first rotating block 9 under the action of the torsion spring 12; when the cover is closed and the motor is started, the second gear 8 acts on the large gear 10, and the first rotating block 9 advances an angle and fits with the second rotating block 11, so that the power torque can be transmitted to the rubber roller gear 3 through the gear group, which can avoid the problem of gear damage caused by hard extrusion, and the movable gear 7 can achieve the same effect at any link in the transmission chain of the main gear group.

[0028] 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 non-stuck gear structure, comprising a main frame (1), characterized in that: A flip cover (2) is movably hinged on one side of the top end of the main frame (1), a rubber roller body (4) is movably mounted on one side of the bottom end of the flip cover (2), a rubber roller gear (3) is mounted on one end of the rubber roller body (4), a printer head (5) is mounted inside the main frame (1), a first gear (6) is mounted on one end of the printer head (5), a movable gear (7) is arranged at one end of the first gear (6), and a second gear (8) is arranged below the movable gear (7); The movable gear (7) comprises a large gear (10) and a small gear (13); the interior of the large gear (10) is fixedly connected to a first rotating block (9); the exterior of the small gear (13) is fixedly connected to a second rotating block (11); and a torsion spring (12) is installed between the large gear (10) and the small gear (13).

2. The non-stuck gear structure according to claim 1, characterized in that: The small gear (13) is embedded in the large gear (10); one end of the torsion spring (12) is clamped with the large gear (10) and the other end is clamped with the small gear (13).

3. The non-stuck gear structure according to claim 1, characterized in that: The first rotating blocks (9) and the second rotating blocks (11) are each provided in three groups, and the second rotating blocks (11) are embedded between the first rotating blocks (9).

4. The non-stuck gear structure according to claim 1, characterized in that: The bottom end of the rubber roller gear (3) can be meshedly connected with the top end of the first gear (6).

5. The non-stuck gear structure according to claim 1, characterized in that: One side of the first gear (6) is meshingly connected with one side of the pinion gear (13).

6. The non-stuck gear structure according to claim 1, characterized in that: The large gear (10) is meshingly connected with the second gear (8).

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