阅读说明：本技术 热敏打印机机芯 (Thermal printer core ) 是由 蒋文柏 张敏 陈志锋 于 2021-03-04 设计创作，主要内容包括：一种热敏打印机机芯,包括机架及设于机架上的电机、传动齿轮组、胶辊组件及打印头,其特征在于所述机架的进纸端转动地设有能给予打印纸摩擦力而使打印纸往胶辊组件方向进行的进纸组件,该进纸组件包括传动轴、驱动轴、进纸辊轮及弹簧,传动轴和驱动轴为离合连接。打印纸刚经过进纸辊轮时,进纸辊轮驱动打印纸前进,打印纸经过胶辊组件时,胶辊组件带动打印纸向前移动,进纸辊轮为对打印纸处于无阻力被动状态,可以降低能耗,这样打印纸也不会出现拱起和褶皱现象。(A thermal printer core comprises a frame, and a motor, a transmission gear set, a rubber roller assembly and a printing head which are arranged on the frame, and is characterized in that a paper feeding assembly which can give friction force to printing paper to enable the printing paper to go towards the direction of the rubber roller assembly is rotatably arranged at a paper feeding end of the frame, the paper feeding assembly comprises a transmission shaft, a driving shaft, a paper feeding roller and a spring, and the transmission shaft is in clutch connection with the driving shaft. When printing paper just passed through the paper feed roller, paper feed roller wheel drive printing paper advanced, and when printing paper passed through rubber roll subassembly, rubber roll subassembly drove printing paper and moves forward, and the paper feed roller is in non-resistance passive state for printing paper, can reduce the energy consumption, and the phenomenon of hunch-up and fold also can not appear beating like this.)

1. A thermal printer movement comprises a frame (1), a motor (4) arranged on the frame (1), a transmission gear set (5), a rubber roller assembly (2) and a printing head (8), wherein a power input end of the transmission gear set (5) is connected with a driving gear (41) of the motor (4), a first power output end is connected with a first input gear (22) of the rubber roller assembly (2), the printing head (8) is arranged close to the rubber roller assembly (2), and the thermal printer movement is characterized in that a paper feeding end of the frame (1) is rotatably provided with a paper feeding assembly (3) capable of giving friction force to printing paper to enable the printing paper to go forward to the rubber roller assembly (2), and the paper feeding assembly (3) comprises a frame (1) and a paper feeding assembly (3) arranged

The transmission shaft (31), the length direction of the parallel rubber roller component (2) can be rotatably arranged on the frame (1), one end of the transmission shaft is provided with a first clutch tooth (331), the other end of the transmission shaft is arranged on a second input gear (32), and the second input gear (32) is connected with a second power output end of the transmission gear set (5);

a driving shaft (38) which is arranged in the same axial direction with the transmission shaft (31), wherein one end of the driving shaft (38) is provided with a second clutch tooth (341) matched with the first clutch tooth (331), and the other end of the driving shaft is rotatably arranged on the frame (1);

a paper feeding roller which is elastically sleeved on the periphery of the driving shaft (38) and the outer surface of which can contact with printing paper to provide friction force, and the paper feeding roller can be rotatably arranged on the frame (1); and

a spring (37) sleeved at one end of the driving shaft (38) and positioned in the axial inner cavity of the paper feeding roller;

when printing paper passes through the paper feeding roller, a first clutch tooth (331) at the upper end of the transmission shaft (31) is matched and connected with a second clutch tooth (341) of the driving shaft (38) so as to drive the paper feeding roller to rotate, the rubber roller assembly (2) drives the printing paper to move forwards when the printing paper passes through the rubber roller assembly (2), the printing paper drives the paper feeding roller to rotate, and then the second clutch tooth (341) is separated from the first clutch tooth (331).

2. A thermal printer movement according to claim 1, wherein said feed roller comprises a support sleeve (36) and a roller sleeve (35) disposed around the support sleeve (36), and said spring (37) is disposed inside the support sleeve (36).

3. A thermal printer movement according to claim 1, characterised in that the frame (1) is provided with a rubber roller holder (21) in a reversible manner, and the rubber roller assembly (2) is rotatably provided on the rubber roller holder (21).

4. The thermal printer movement according to claim 3, wherein the inside of the rubber roller holder (21) is provided with an elastic sheet (6), one side of the elastic sheet (6) close to the paper feed roller extends to form an abutting part (61) capable of damping the printing paper, and the abutting part (61) is formed by obliquely bending the front end of the elastic sheet (6) and can be in surface contact with the outer surface of the paper feed roller.

5. The thermal printer movement according to claim 4, wherein an elastic blocking sheet (7) is disposed on a side of the resilient sheet (6) adjacent to the sheet feeding roller, and a passage for a single piece of printing paper to pass through is formed between a front end surface of the blocking sheet (7) and an outer surface of the sheet feeding roller in a printing state.

6. A thermal printer movement according to claim 5, wherein said abutting portions (61) are a pair and are spaced apart from each other at a front end of the spring plate (6), a bracket portion (62) is formed between the abutting portions (61) at the front end of the spring plate (6), and said blocking plate (7) is disposed on the bracket portion (62).

7. A thermal printer movement according to claim 5, characterised in that the front face of the blocking tab (7) is arranged obliquely.

Technical Field

The present invention relates to a printing apparatus, and more particularly, to a thermal printer.

Background

The existing thermal printer movement basically comprises a bracket, a motor arranged on a rack, a transmission gear set, a rubber roller assembly and a printing head, wherein a power input end of the transmission gear set is connected with a driving gear of the motor, a power output end of the transmission gear set is connected with a first input gear of the rubber roller assembly, the printing head is arranged close to the rubber roller assembly, the printing head is attached to the rubber roller assembly by elastic pressure, the rubber roller assembly drives printing paper entering between the printing head and the rubber roller assembly to advance and execute printing work by driving rotation of the motor, at present, paper feeding rollers are often arranged at a paper feeding end so as to provide friction force for the printing paper and smoothly enter a printing area, but if the speed of the paper feeding rollers is too high, the printing paper between the paper feeding rollers and the rubber roller assembly is easy to arch, wrinkles are generated; in addition, after the printing paper runs to the tail end, new paper needs to be put in manually, and the operation brings much trouble to a user, and the paper is not easy to be put in, so that various problems such as skew and deformation of the printing content occur. Improvements are therefore needed.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide a thermal printer core in which printing paper is not easily wrinkled in view of the above technical situation.

The second technical problem to be solved by the invention is the thermal printer core which can place a plurality of printing papers at one time and can print one by one.

The technical scheme adopted by the invention for solving the first technical problem is as follows: a thermal printer movement comprises a frame, a motor, a transmission gear set, a rubber roller assembly and a printing head, wherein the motor, the transmission gear set, the rubber roller assembly and the printing head are arranged on the frame, a power input end of the transmission gear set is connected with a driving gear of the motor, a power output end of the transmission gear set is connected with a first input gear of the rubber roller assembly, the printing head is arranged close to the rubber roller assembly, and the thermal printer movement is characterized in that a paper feeding assembly which can give friction force to printing paper to enable the printing paper to be carried out towards the rubber roller assembly is rotatably arranged at

The transmission shaft is arranged on the frame in a way that the length direction of the parallel rubber roller component can rotate, one end of the transmission shaft is provided with a first clutch tooth, the other end of the transmission shaft is provided with a second input gear, and the second input gear is connected with the power output end of the transmission gear set;

the driving shaft and the transmission shaft are arranged in the same axial direction, one end of the driving shaft is provided with a second clutch tooth matched with the first clutch tooth, and the other end of the driving shaft is rotatably arranged on the rack;

a paper feeding roller elastically sleeved on the periphery of the driving shaft and having an outer surface capable of contacting with printing paper to provide friction force, wherein the paper feeding roller is rotatably arranged on the frame; and

the spring is sleeved at one end of the driving shaft and is positioned in the axial inner cavity of the paper feeding roller;

beat printing paper under the state of paper feed roller wheel, the cooperation of the first separation and reunion tooth of transmission shaft upper end and the second separation and reunion tooth of drive shaft is connected, and then drive the paper feed roller wheel and rotate, beat printing paper under the state of beating paper through rubber roll subassembly, rubber roll subassembly drives and beats printing paper and move forward, and beat printing paper and drive the paper feed roller wheel and rotate, and then the second separation and reunion tooth breaks away from first separation and reunion tooth.

Preferably, the paper feeding roller comprises a supporting sleeve and a roller sleeve arranged on the periphery of the supporting sleeve, and the spring is positioned in the supporting sleeve.

Further, a rubber roll bracket can be arranged on the rack in a turnover mode, and the rubber roll assembly can be rotatably arranged on the rubber roll bracket.

The rubber roll support inboard be equipped with the bullet preforming, should play the preforming and extend one side near the paper feed running roller and have the portion of supporting that can produce the damping to the printing paper, the portion of supporting bend by the slope of bullet preforming front end and form and can realize the face contact with the paper feed running roller surface. Can provide the friction force between the paper feeding roller and the printing paper.

The technical scheme adopted by the invention for solving the second technical problem is as follows: the thermal printer core is characterized in that one side of the elastic pressing sheet close to the paper feeding roller is provided with an elastic blocking sheet, and a channel for a single piece of printing paper to pass through is formed between the front end surface of the blocking sheet and the outer surface of the paper feeding roller in a printing state. The blocking sheet is used for blocking the non-bottommost paper from entering the printing area.

The support part is a pair of support parts and is arranged at the front end of the spring pressing plate at intervals, the front end of the spring pressing plate is positioned between the support parts to form a support part, and the blocking plate is arranged on the support part. The abutting parts arranged at intervals also have a certain guiding function on the printing paper.

The front end face of the blocking piece is obliquely arranged, so that the blocking piece and the outer end cylindrical surface of the paper feeding roller form a gradually reduced channel, and the printing paper is favorably conveyed.

Compared with the prior art, the invention has the advantages that: when beating printing paper and just having passed through the paper feed roller, the cooperation of the first separation and reunion tooth of transmission shaft upper end and the second separation and reunion tooth of drive shaft is connected, and then the drive paper feed roller rotates, beat printing paper when beating the paper and pass through rubber roll subassembly, rubber roll subassembly drives to beat printing paper and moves forward, and beat printing paper and drive the paper feed roller and rotate, because rubber roll subassembly rotational speed is greater than paper feed roller speed, and second separation and reunion tooth breaks away from first separation and reunion tooth like this, beat printing paper just can not appear hunch-up and fold phenomenon like this, the paper feed roller is in non-resistance passive state for beating.

A connecting spring is sleeved between the driving shaft and the supporting sleeve, so that the driving shaft and the paper feeding rubber roller wheel can slip when the load is too large, and the generation of too large friction tension of the paper feeding rubber roller wheel to paper is limited; the paper damage under the condition that the paper is forcibly pulled out from the paper feeding roller by people and the paper is jammed during running is avoided.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment.

FIG. 2 is a schematic structural diagram of the embodiment after the rubber roll bracket is taken out.

FIG. 3 is a schematic structural view of the embodiment after the rubber roll bracket and the connecting bracket are taken out.

Fig. 4 is an exploded view of the embodiment.

Fig. 5 is a state diagram of the connection of the first joint and the second joint in fig. 4.

Fig. 6 is a transverse cross-sectional view of fig. 5.

Fig. 7 is an enlarged view of the knock-out plate.

Fig. 8 is an enlarged sectional view of the embodiment.

Fig. 9 is an enlarged view of a portion a in fig. 8.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the thermal printer core in this embodiment includes a frame 1, and a motor 4, a rubber roller bracket 21, a transmission gear set 5, a rubber roller assembly 2, a printing head 8 and a paper feeding assembly 3 which are arranged on the frame 1, where the frame 1 is U-shaped, and a connecting bracket 12 is further arranged in the middle of the frame, so as to play a role in strengthening and be used for arranging other detection components.

The power input end of the transmission gear set 5 is connected with the driving gear 41 of the motor 4, the first power output end is connected with the first input gear 22 of the rubber roller assembly 2, and the printing head 8 is arranged close to the rubber roller assembly 2.

The rubber roll bracket 21 can be arranged on the frame 1 in a turnover mode, and the rubber roll component 2 can be arranged on the rubber roll bracket 21 in a rotating mode.

The paper feeding assembly 3 is rotatably disposed at a paper feeding end of the frame 1, and can provide friction force to the printing paper to move the printing paper toward the glue roller assembly 2, and the paper feeding assembly 3 includes a transmission shaft 31, a driving shaft 38, a paper feeding roller and a spring 37.

The transmission shaft 31 is rotatably disposed on the frame 1 in the length direction of the parallel rubber roller assembly 2, and has a first clutch tooth 331 at one end, specifically, as shown in fig. 5 and 6, the transmission shaft 31 has a first joint 33 at one end, the first joint is formed with the first clutch tooth 331, one end of the transmission shaft 31 is rotatably disposed on the bearing sleeve 11, and the other end is disposed on the supporting portion 15 of the frame. The other end of the transmission shaft 31 is arranged on a second input gear 32, and the second input gear 32 is connected with a second power output end of the transmission gear set 5.

The driving shaft 38 is disposed in the same axial direction as the transmission shaft 31, and one end of the driving shaft 38 is provided with a second clutch tooth 341 which is engaged with the first clutch tooth 331, and specifically, as shown in fig. 5 and 6, one end of the driving shaft 38 is provided with a second coupling 34 on which the second clutch tooth 341 is formed. The other end of the driving shaft is rotatably arranged on the frame 1, and the two ends of the driving shaft 38 are respectively rotatably arranged on the supporting part 13 and the supporting part 14 of the frame.

As shown in fig. 4, a feeding roller is elastically fitted around the driving shaft 38 and an outer surface of the feeding roller contacts with the printing paper to provide a frictional force, and the feeding roller is rotatably provided on the frame 1. The feeding roller in this embodiment includes a supporting sleeve 36 and a roller sleeve 35 disposed on the outer periphery of the supporting sleeve 36, and the spring 37 is disposed in the supporting sleeve 36.

The driving shaft 38 is sleeved in the spring 37, the supporting sleeve 36 is sleeved in the driving shaft 38 and the spring 37, the roller sleeve 35 is elastically sleeved in and clamped on the supporting sleeve 36, the cylindrical outer surface of the roller sleeve 35 can be contacted with printing paper to provide friction force, and the roller sleeve 35 can be rotatably arranged on the frame 1; the driving shaft 38 is sleeved with the spring 37, an inner ring hole of the spring 37 is elastically meshed with a conical cylindrical surface of the driving shaft 38, and an outer ring cylindrical surface of the spring 37 is elastically meshed with a cylindrical hole of an inner cavity of the supporting sleeve 36, so that the driving shaft 38 drives the roller feeding sleeve 35 to rotate through the spring 37.

The transmission gear set in the embodiment comprises a duplicate gear 51, a duplicate gear 52, a duplicate gear 53 and a duplicate gear 54, wherein the duplicate gear 52 is meshed with the duplicate gear 54, the duplicate gear 52 is meshed with the duplicate gear 51, the duplicate gear 53 is meshed with the duplicate gear 51, the driving gear 41 is meshed with the duplicate gear 54, the duplicate gear 51 is meshed with the first input gear 21, the duplicate gear 46 is meshed with the second input gear 32, the rotating speed of the first input gear 21 is greater than that of the second input gear 32, and therefore the driving speed of the paper feeding roller assembly to the printing paper is greater than that of the paper feeding roller.

As shown in fig. 8 and 9, the inside of the rubber roller bracket 21 is provided with the elastic sheet 6, one side of the elastic sheet 6 close to the paper feeding roller extends to form a supporting portion 61 capable of damping the printing paper, and the supporting portion 61 is formed by bending the front end of the elastic sheet 6 in an inclined manner and is in surface contact with the outer surface of the paper feeding roller. One side of the elastic pressing sheet 6 close to the paper feeding roller is provided with an elastic blocking sheet 7, and the blocking sheet 7 in the embodiment is made of soft rubber and has elasticity. In a printing state, a channel for a single piece of printing paper to pass through is formed between the front end surface of the blocking sheet 7 and the outer surface of the paper feeding roller. Referring to fig. 4 and 7, the abutting portions 61 in this embodiment are a pair and are arranged at the front end of the pressing sheet 6 at intervals, the abutting portions 61 also have a guiding function for the printing paper, a bracket portion 62 is formed between the abutting portions 61 at the front end of the pressing sheet 6, and the blocking sheet 7 is arranged on the bracket portion 62. The front end face of the blocking piece 7 is obliquely arranged, so that the blocking piece and the outer end cylindrical surface of the paper feeding roller form a gradually reduced channel, and the printing paper is favorably conveyed.

Referring to fig. 5, 6, 8 and 9, when the printing paper passes through the paper feeding roller, the first clutch tooth 331 on the upper end of the transmission shaft 31 is connected to the second clutch tooth 341 of the driving shaft 38 in a matching manner, so as to drive the paper feeding roller to rotate, when the printing paper passes through the rubber roller assembly 2, the rubber roller assembly 2 drives the printing paper to move forward, and the printing paper drives the paper feeding roller to rotate, so that the second clutch tooth 341 disengages from the first clutch tooth 331, thereby achieving separation.

The paper feeding roller is driven by the contact of the first clutch tooth and the second clutch tooth, and after the printing paper advances to the rubber roller assembly and the printing head, the main driving force for the printing paper is the friction force traction of the rubber roller assembly to the printing paper.

As shown in fig. 8 and 9, the abutting part 61 and the blocking piece 7 are in contact with the paper surface under the elastic action to generate a relatively large frictional resistance to realize the travel blocking of the non-bottommost printing paper 10. The driving static friction force generated by the bottommost layer paper 10a and the paper feeding roller is larger than the friction resistance of the printing paper support, the abutting part 61 and the blocking piece 7 to the printing paper, and when only one piece of printing paper is printed, the frictional resistance of the abutting part 61 and the blocking piece 7 to the printing paper does not influence the forward driving of the printing paper, so that the blocking design of non-bottommost layer paper of a plurality of pieces of printing paper at the paper feeding end is realized.