CN211662865U - Printer core and fixing mechanism of rubber roller shaft sleeve thereof and thermal printer - Google Patents

Abstract

The utility model discloses a print cartridge and fixed establishment and thermal printer of rubber roll axle sleeve thereof, wherein, the fixed establishment of the rubber roll axle sleeve of print cartridge is including controlling the axle sleeve seat, is located the left and right sides wall of printer, and these two axle sleeve seat structures are the same, all have the bottom and control the fluting, and this fluting makes top open-ended semicircle opening axle sleeve seat become left and right, end three fens axle sleeve seats. The left and right parts become the elastic shaft sleeve clamping wall which can be opened left and right, so that the shaft sleeve can be elastically opened when passing through a narrow opening above the shaft sleeve seat, the shaft sleeve enters the working position of the shaft sleeve seat through the narrow opening under a preset pressure value, the narrow opening rebounds to the original position, and the shaft sleeve is also clamped by the rebounded left and right walls to work correctly. The utility model discloses need not metal bullet line jump ring, just can block the rubber roll axle sleeve with three fens axle sleeve seats self elasticity, and with the main support structure as an organic whole of printer core, avoided the installation of traditional metal bullet line jump ring and the problem that drops in the use, practiced thrift the cost again.

Description

Printer core and fixing mechanism of rubber roller shaft sleeve thereof and thermal printer

Technical Field

The utility model belongs to the printer structure field specifically relates to a fixed establishment, printer core and thermal printer of the rubber roll axle sleeve of printer core.

Background

The printer core of the thermal printer generally comprises a main bracket of the printer core and a rubber roller rotatably arranged on the main bracket, and the printer core is arranged in the thermal printer and drives the rubber roller to rotate through a power source in the printer to realize printing.

As shown in fig. 1 and 2, in the field of thermal printer cores, the conventional way of fixing the rubber roller assembly 2 of the printer core is to use a metal spring-line snap spring 3 to be installed in a clamping groove of a main bracket 1 of the printer core to press a left bearing 21 and a right bearing 22 of the rubber roller assembly 2, so that the left bearing 21 and the right bearing 22 are positioned in a "U" shaped groove 11 and a "U" shaped groove 12 on the left and right sides of the main bracket 1. The elastic line snap spring 3 has the defects that the elastic line snap spring 3 is an independent part clamped on the main support 1 of the printer core, and the problems of loss, elastic fatigue fracture and no clamping in place in the installation process of the metal elastic line snap spring 3 in falling off and the like often occur in the use process, so that the printing failure of the printer core is caused.

Disclosure of Invention

An object of the utility model is to provide a fixed establishment, printer core and the thermal printer of the rubber roll axle sleeve of printer core are used for solving the above-mentioned technical problem who exists.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a fixing mechanism of roller cover of glue roller of printer core, is including setting up the positioning groove on the main support, positioning groove's cell wall is equipped with two spaced kerfs to left cell wall and the right cell wall with positioning groove separate with the kerve wall respectively, make interval elasticity between left cell wall and the right cell wall variable, under the effect of predetermined external force as the axle sleeve of glue roller subassembly, through a slot tamponade on the route back in this slot entering positioning groove, left cell wall, right cell wall and kerve wall are contradicted the contact with the axle sleeve respectively and are fixed the axle sleeve in positioning groove.

Furthermore, two kerfs are respectively positioned at the joint of the bottom groove wall and the left groove wall and the joint of the bottom groove wall and the right groove wall.

Furthermore, the cutting seam comprises an upper cutting seam section and a lower cutting seam section, the upper cutting seam section is arranged in an outward inclined mode from top to bottom, and the lower cutting seam section is arranged in an inward inclined mode from top to bottom.

Furthermore, the inclination angle of the lower cutting slit section is 0-5 degrees.

Furthermore, the left groove wall and the right groove wall are respectively provided with a first arc-shaped part matched with the shaft sleeve.

Furthermore, the bottom groove wall is provided with a second arc-shaped part matched with the shaft sleeve.

Further, the main support is a plastic main support.

The utility model also provides a printer core is equipped with foretell printer core's rubber roll fixed establishment.

The utility model also provides a thermal printer is equipped with foretell printer core.

The utility model has the advantages of:

the utility model discloses when carrying out rubber roll axle sleeve fixed, need not to use metal bullet line jump ring, just can block the rubber roll axle sleeve with positioning groove (axle sleeve seat) self elasticity, and the fixed establishment of rubber roll axle sleeve is the integrated into one piece structure with the main support of printing the core, has avoided the installation of traditional metal bullet line jump ring and has come off the scheduling problem in the use, has improved the reliability that the printing core printed, has practiced thrift the cost simultaneously, and the installation of rubber roll subassembly with dismantle portably.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a printer core for fixing a rubber roller in a traditional metal spring wire clamp spring mode;

FIG. 2 is a schematic structural diagram of a main bracket of a printer core for fixing a rubber roller in a traditional metal spring wire clamp spring mode;

fig. 3 is a schematic structural view of a main support of a printer cartridge embodying the present invention;

FIG. 4 is an enlarged view of portion A of FIG. 3;

fig. 5 is a schematic structural view of the main bracket mounted with the rubber roller according to the embodiment of the present invention.

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

As shown in fig. 3-5, a fixing mechanism for a rubber roller shaft sleeve of a printer core includes two positioning grooves 12 disposed on a main support 1 of the printer core, specifically, the two positioning grooves 12 are disposed on two opposite side walls 11 of the main support 1 respectively and coaxially.

The groove wall of the positioning groove 12 is provided with two spaced slits 13, so that the left groove wall 121 and the right groove wall 122 of the positioning groove 12 are separated from the bottom groove wall 123, respectively (the left, right, up and down directions are based on the direction of fig. 3), so that the distance between the left groove wall 121 and the right groove wall 122 is elastically variable, that is, by providing two spaced slits 13, the left main support side portion 111 at the left side of the positioning groove 12 and the right main support side portion 112 at the left side and the right side of the positioning groove 12 are formed as two elastic hooking arms.

When the sleeve 21 (bearing) of the rubber roller assembly 2 is pressed and plugged into the positioning groove 12 through a narrow opening in the path under the action of a predetermined external force, the left groove wall 121, the right groove wall 122 and the bottom groove wall 123 respectively contact with the outer peripheral surface of the bearing 21 in an abutting manner, so that the bearing 21 is fixed in the positioning groove 12. That is, the distance between the left groove wall 121 and the right groove wall 122 is smaller than the outer diameter of the sleeve 21 of the rubber roll assembly 2 in a free state, that is, a narrow opening is formed, when the sleeve 21 of the rubber roll assembly 2 is jammed and pressed into the positioning groove 12 through the narrow opening under the action of a predetermined external force, the left side part 111 and the right side part 112 of the main bracket are pressed, so that the distance between the left groove wall 121 and the right groove wall 122 is increased by the outward elastic deformation of the sleeve 21 of the rubber roll assembly 2, the narrow opening is spread, so that the sleeve 21 enters the bottom of the positioning groove 1 through the narrow opening, and then under the action of the elastic restoring force of the left side part 111 and the right side part 112 of the main bracket, the left groove wall 121 and the right groove wall 122 are rebounded to abut against the outer peripheral surface of the bearing 21 to press.

In this embodiment, the two slits 13 are respectively located at the connection position of the bottom groove wall 123 and the left groove wall 121 and the connection position of the bottom groove wall 123 and the right groove wall 122, which is rational in structure, and make the main bracket left side portion 111 and the main bracket right side portion 112 have better elasticity, but not limited thereto, and in other embodiments, the slits 13 may be located at other positions of the groove walls of the positioning groove 12, such as at the lower portion of the left groove wall 121 and the lower portion of the right groove wall 122, respectively.

Preferably, in this embodiment, the slit 13 includes an upper slit segment 131 and a lower slit segment 132, the upper slit segment 131 is disposed to be inclined outwards from top to bottom, the lower slit segment 132 is disposed to be inclined inwards from top to bottom, that is, the upper slit segment 131 of the slit 13 on the left side is disposed to be inclined leftwards from top to bottom, the lower slit segment 132 is disposed to be inclined rightwards from top to bottom, the upper slit segment 131 of the slit 13 on the right side is disposed to be inclined rightwards from top to bottom, and the lower slit segment 132 is disposed to be inclined leftwards from top to bottom, so that the elasticity of the main frame left portion 111 and the main frame right portion 112 is better, and the service life is longer.

Of course, in other embodiments, the shape of the slit 13 may be circular arc, linear, or other various shapes.

The length of the slit 13 can be selected according to practical needs, which can be easily realized by those skilled in the art and will not be described in detail.

Preferably, in this embodiment, the inclination angle a (i.e. the angle between the upper and lower directions) of the lower slit segment 132 is 0-5 °, and more preferably, the inclination angle a is 5 °, so that the main frame left side portion 111 and the main frame right side portion 112 have better elasticity and longer service life, but not limited thereto.

In this embodiment, the positioning groove 12 is a U-shaped groove structure or a substantially U-shaped groove structure, which is simple in structure and easy to implement, but not limited thereto, and in other embodiments, the positioning groove 12 may also be in other shapes, such as an isosceles trapezoid groove.

Preferably, in this embodiment, the left groove wall 121 and the right groove wall 122 are respectively provided with first arc- shaped portions 1211 and 1221 adapted to the shaft sleeve 21, so that the left groove wall 121 and the right groove wall 122 can better contact with the outer peripheral surface of the shaft sleeve 21, and the firmness and stability of fixation are improved.

Preferably, in this embodiment, the bottom groove wall 123 is provided with a second arc-shaped portion 1231 adapted to the shaft sleeve 21, so that the bottom groove wall 123 can better contact with the outer peripheral surface of the shaft sleeve 21, and the firmness and stability of the fixation are improved.

In this embodiment, the main support 1 is preferably a plastic main support, which has better elasticity and low cost, but not limited thereto.

In this embodiment, the slit 13 may be formed by cutting or may be formed by integrally injection molding.

During installation, the shaft sleeves 21 at the two ends of the rubber roller assembly 2 are respectively pressed into the positioning grooves 12 on the two opposite side walls 11 of the main support 1 by force, so that the shaft sleeves 21 can be fixedly installed in the positioning grooves 12, the rubber roller assembly 2 is rotatably installed on the main support 1, the installation is convenient and fast, a metal elastic line clamp spring is not needed, a fixing mechanism of the rubber roller shaft sleeve and the main support 1 of the printer core are of an integrated structure, the problems that the traditional metal elastic line clamp spring falls off in installation and use and the like are solved, the printing reliability of the printer core is improved, and the cost is saved; when the detachable umbrella is to be detached, the umbrella only needs to be pulled out forcibly, and the detachment is simple and convenient.

The utility model also provides a printer core is equipped with foretell printer core's rubber roll fixed establishment.

Furthermore, the utility model also provides a thermal printer is equipped with foretell printer core.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (9)

1. The utility model provides a fixed establishment of printer core's rubber roll axle sleeve, includes the positioning groove who sets up on the main support, its characterized in that: the groove wall of the positioning groove is provided with two spaced cutting seams, so that the left groove wall and the right groove wall of the positioning groove are separated from the bottom groove wall respectively, the distance between the left groove wall and the right groove wall is elastically variable, and when the shaft sleeve of the rubber roller assembly is under the action of a preset external force, the left groove wall, the right groove wall and the bottom groove wall are in abutting contact with the shaft sleeve respectively to fix the shaft sleeve in the positioning groove after the shaft sleeve on a path enters the positioning groove through the narrow opening.

2. The fixing mechanism of the rubber roller shaft sleeve of the printer core according to claim 1, characterized in that: the two cutting seams are respectively positioned at the joint of the bottom groove wall and the left groove wall and the joint of the bottom groove wall and the right groove wall.

3. The fixing mechanism of the rubber roller shaft sleeve of the printer core according to claim 2, characterized in that: the joint cutting comprises an upper joint cutting section and a lower joint cutting section, the upper joint cutting section is arranged in an outward inclined mode from top to bottom, and the lower joint cutting section is arranged in an inward inclined mode from top to bottom.

4. The fixing mechanism of the rubber roller shaft sleeve of the printer core according to claim 3, characterized in that: the inclination angle of the lower cutting seam section is 0-5 degrees.

5. The fixing mechanism of the rubber roller shaft sleeve of the printer core according to claim 1, characterized in that: and the left groove wall and the right groove wall are respectively provided with a first arc-shaped part matched with the shaft sleeve.

6. The fixing mechanism of the rubber roller shaft sleeve of the printer core according to claim 5, characterized in that: the bottom groove wall is provided with a second arc-shaped part matched with the shaft sleeve.

7. The fixing mechanism of the rubber roller shaft sleeve of the printer core according to claim 1, characterized in that: the main support is a plastic main support.

8. A printer cartridge, characterized by: fixing mechanism for a glue roller sleeve provided with a printer movement according to any one of claims 1 to 7.

9. A thermal printer, characterized by: a printer cartridge according to claim 8 is provided.

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