CN211222595U

CN211222595U - Thermal head assembly

Info

Publication number: CN211222595U
Application number: CN201922055406.0U
Authority: CN
Inventors: 程峰祥
Original assignee: Huqiu Imaging Technologies Suzhou Co ltd
Current assignee: Huqiu image (Suzhou) Co.,Ltd.
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2020-08-11
Anticipated expiration: 2029-11-25

Abstract

The utility model relates to a thermal printer's technical field, concretely relates to thermal head subassembly, including thermal printing part and drive thermal printing part pivoted drive case, be equipped with first driving medium in the drive case and with the second driving medium of first driving medium engaged with, the output shaft axle head of second driving medium with thermal printing part fixed connection, one side of drive case is equipped with and reduces first driving medium with the taut part of fit-up gap between the second driving medium, just taut part with first driving medium with second driving medium elastic connection. Through setting up taut part, can reduce the fit-up gap of first driving medium and second driving medium, reduce the printing error of temperature sensing head subassembly for the printing precision of printer is better, has reduced the clearance simultaneously and has made the repeatability of temperature sensing head subassembly good, has guaranteed the printing quality of printer.

Description

Thermal head assembly

Technical Field

The utility model relates to a thermal printer's technical field, concretely relates to thermal head subassembly.

Background

The working principle of the thermal printer is that a semiconductor heating element is arranged on a printing head, and the printing head can print required patterns after being heated and contacting thermal printing paper. Thermal printing paper is a special coated paper with an appearance similar to that of plain white paper. The surface of the thermal printing paper is coated with a thermal coloring layer which consists of an adhesive, a color developing agent, a leuco dye and the like. When the thermal printing paper meets a heating printing head, the color developing agent and the leuco dye at the printing position of the printing head are subjected to chemical reaction to change color, and the image and text are formed. The thermal printer selectively heats the thermal printer paper at certain locations, thereby creating a corresponding pattern.

The Chinese utility model patent with the publication number of CN203401823U discloses an automatic positioning mechanism for a printing thermal head, which comprises a printing rubber wheel and a printing thermal head, wherein the initial position of the printing thermal head is positioned at the rear upper part of the printing rubber wheel, and the printing thermal head is pressed against the printing rubber wheel in a rotating manner through a driving structure during printing, the driving structure comprises a main rotating shaft and a hinge, one end of the hinge is connected to the main rotating shaft, and the other end of the hinge is connected to the rear lower part of the printing thermal head; one end of the main rotating shaft is connected with the output end of the worm and gear box, the input end of the worm and gear box is connected with the output shaft of the motor, and thermal head positioning blocks are installed on two sides of the printing thermal head; the protruding part of the thermal head positioning block is lower than a thermal printing line for printing the thermal head and is vertical to the plane of the thermal printing line; when the printing thermal head is contacted with the printing rubber wheel, the thermal head positioning block is contacted with a bearing of the printing rubber wheel.

However, the above prior art solutions have the following drawbacks: there is the fit-up gap between some drive assemblies in the worm gear case, and after repetitious usage printer, the clearance between the drive assembly can increase, causes the printing accuracy reduction of temperature sensing head subassembly, and then influences the printing quality of printer.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a thermal head subassembly to after solving among the prior art and repetitious usage printer, the clearance between the drive assembly can increase, causes the printing accuracy to reduce, influences the technical problem of the printing quality of printer.

In order to realize the above object, the utility model discloses a technical scheme provide a thermal head assembly, including thermal printing part and drive thermal printing part pivoted drive case, be equipped with first driving medium in the drive case and with the second driving medium of first driving medium engaged with, the output shaft axle head of second driving medium with thermal printing part fixed connection, one side of drive case is equipped with and reduces first driving medium with the taut part of fit-up gap between the second driving medium, just taut part with first driving medium with second driving medium elastic connection.

Furthermore, the tensioning part comprises an elastic tensioning piece, the thermal printing part comprises a structural frame and a printing head which is positioned in the structural frame and is rotationally connected with the structural frame, one end of the elastic tensioning piece is fixedly connected with the structural frame, the other end of the elastic tensioning piece is fixedly connected with the printing head, and the printing head is fixedly connected with the output shaft end of the second transmission piece.

Further, the structural framework comprises a group of end plates which are arranged oppositely, the driving box is arranged on the outer side of each end plate, the printing head is located on the inner side of each end plate, and the output shaft end of the second transmission piece extends into the inner side of each end plate and is fixedly connected with the printing head.

Furthermore, a guide hole is formed in the end plate, sliding columns are arranged at two ends, close to the end plate, of the printing head, and the sliding columns penetrate through the guide hole and are connected with the guide hole in a sliding mode.

Furthermore, the driving box comprises a driving piece and a reduction box connected with the shaft end of an output shaft of the driving piece, and the first transmission piece and the second transmission piece are located in the reduction box.

Further, the thermal head assembly further comprises a control part for controlling the printing head to stop rotating, and the control part is positioned on the inner side of the end plate.

Further, the control part comprises a sensor for transmitting a touch signal and a connecting piece which can be contacted with or separated from the sensor, the sensor is positioned on the inner side of the end plate, and the connecting piece is positioned at one end of the printing head.

Furthermore, the connecting piece is provided with a groove, the connecting piece is connected to the sensor in a sliding mode, and the sensor can be located in the groove and separated from the connecting piece.

Further, the thermal printing component further comprises a heat sink located on top of the printhead.

The utility model provides a lens structure and additional lens mechanism's beneficial effect lies in:

1. through setting up taut part, can reduce the fit-up gap of first driving medium and second driving medium, reduce the printing error of temperature sensing head subassembly for the printing precision of printer is better, has reduced the clearance simultaneously and has made the repeatability of temperature sensing head subassembly good, has guaranteed the printing quality of printer.

2. The tensioning part comprises an elastic tensioning piece, the thermal printing part comprises a structural framework and a printing head, one end of the elastic tensioning piece is fixedly connected to the structural framework, the other end of the elastic tensioning piece is fixedly connected to the printing head, the elastic tensioning piece is arranged, so that the printing head and the structural framework are always in a tensioned state, and then a tensioned state is kept between the first transmission piece and the second transmission piece in the reduction gearbox, the fit clearance between the first transmission piece and the second transmission piece is reduced, the printing error of the printing head is reduced, and the printing quality is ensured.

3. Through the setting of slip post and guiding hole, the guiding hole slides to the slip post and carries on spacingly, avoids beating printer head and produces mechanical wear and tear after the rotation many times and lead to rotating the skew, and then influences and beat printer head butt main shaft, and guiding hole and slip post have ensured and have beaten the accurate butt main shaft of printer head, have ensured printing quality.

4. The driving box is installed through the end plate arranged, so that the driving box drives the printing head to rotate, and the printing function is achieved. The drive box sets up in the outside of end plate, beats printer head and is located the inboard of end plate, makes to beat printer head through the end plate that sets up and is located structural framework, and the drive box is located structural framework outside, and the drive box is kept apart by the end plate with the printer head for the drive box does not influence and beats printer head's rotation, is convenient for drive box and beats printer head and all normally work.

5. The driving box comprises a driving piece and a reduction box, when the printer is used, the rotation angle of the thermosensitive printing part is very small, if the driving piece is directly used for driving, the rotation angle of the thermosensitive printing part is not well controlled, so that the reduction box is arranged to reduce the rotation of the driving piece, and the thermosensitive printing part is rotated by a small angle to facilitate control.

6. Through the control unit who sets up, the stall of control printing head avoids printing the too big damage that makes printing head striking to structural framework and cause printing head of the turned angle of printer head, and control unit has played the effect of protection printing head to a certain extent.

7. The control part comprises a sensor and a connecting sheet which can be contacted with and separated from the sensor, after printing is finished, the driving box drives the printing head to rotate, when the printing head rotates to a state that the connecting sheet is separated from the sensor, the driving box stops working, and at the moment, the printing head stops rotating. The sensor and the connecting piece are arranged to control the rotation of the printing head, so that the printing head is prevented from impacting the structural frame, and the sensor and the connecting piece are arranged to protect the printing head.

8. The connecting piece is provided with a groove, the connecting piece is connected to the sensor in a sliding mode, after printing is finished, the driving box drives the printing head to rotate and further drives the connecting piece to rotate, when the connecting piece rotates to be separated from the sensor, namely when the sensor is located in the groove, the driving box stops working, and at the moment, the printing head stops rotating. Through the arranged groove, the connecting sheet can be separated from the sensor when moving to a set position, and the purpose of automatic control is achieved.

9. The thermal printing component further comprises a heat dissipation part, the heat dissipation part is located at the top of the printing head, the printing head can generate certain heat when in work, the printing head is easy to damage when the temperature is too high, the printing head can be timely cooled through the heat dissipation part, the temperature of the printing head is prevented from being too high, and the heat dissipation part plays a role in protecting the printing head.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are 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 overall structural diagram of a thermal head assembly according to an embodiment of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is an exploded schematic view of an overall structure of a thermal head assembly according to an embodiment of the present invention;

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

fig. 5 is a schematic overall cross-sectional structural diagram of a thermal head assembly according to an embodiment of the present invention.

Description of reference numerals:

1. a thermal printing component; 11. a print head; 111. a sliding post; 12. a structural frame; 121. an end plate; 1211. a guide hole; 1212. a hole of abdication; 122. a front plate; 123. a top plate; 124. a back plate; 125. A latch shaft; 13. a heat sink; 14. connecting blocks; 2. a drive box; 21. a drive member; 22. a reduction gearbox; 3. a tension member; 31. an elastic tension member; 32. pulling a hook; 4. a control component; 41. a sensor; 411. a fixed part; 412. a connecting portion; 4121. a chute; 42. connecting sheets; 421. and (4) a groove.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Referring to fig. 1, as the embodiment of the present invention provides a thermal head assembly, including thermal printing part 1 and drive thermal printing part 1 pivoted drive box 2, be equipped with first driving piece (not shown) and with the second driving piece (not shown) of first driving piece engaged with in the drive box 2, the output shaft axle head and the thermal printing part 1 fixed connection of second driving piece, one side of drive box 2 is equipped with the tension part 3 that reduces fit-up gap between first driving piece and the second driving piece, and tension part 3 and first driving piece and the direct or indirect elastic connection of second driving piece. Through setting up taut part 3, can reduce the fit-up gap of first driving medium and second driving medium, reduce the printing error of temperature sensing head subassembly for the printing precision of printer is better, has reduced the clearance simultaneously and has made the repeatability of temperature sensing head subassembly good, has guaranteed the printing quality of printer.

Referring to fig. 1 and 3, in particular, the thermal printing component 1 comprises a structural frame 12 and a print head 11, the print head 11 being located within the structural frame 12 and being rotatably connected to the structural frame 12. The structural frame 12 includes a front plate 122, a rear plate 124, a top plate 123 and a set of end plates 121 disposed opposite to each other, the front plate 122, the rear plate 124, the top plate 123 and the end plates 121 enclose a cavity with an opening at the bottom, the printhead 11 is located in the structural frame 12 and rotatably connected to the structural frame 12, and one side of the printhead 11 extends out of the opening of the structural frame 12. The driving box 2 is installed outside the end plate 121, the printing head 11 is located inside the end plate 121, the printing head 11 is located in the structural frame 12 through the arranged end plate 121, the driving box 2 is located outside the structural frame 12, the driving box 2 and the printing head 11 are isolated by the end plate 121, the driving box 2 does not affect the rotation of the printing head 11, and both the driving box 2 and the printing head 11 can work normally. The driving box 2 can also be installed inside the end plate 121, and at this time, the distance between one end of the print head 11 and the end plate 121 needs to be adjusted, so as to prevent the print head 11 from abutting against the driving box 2 when the print head 11 rotates, and the print head 11 cannot rotate.

Referring to fig. 1 and 3, including driving piece 21 and reducing gear box 22 in the drive case 2, the output axle head of driving piece 21 is connected with reducing gear box 22, be equipped with first driving piece and second driving piece in the reducing gear box 22, when using the printer, the turned angle of printer head 11 is very little, if directly use driving piece 21 drive, the turned angle to printer head 11 is not well controlled, consequently through setting up reducing gear box 22 to the rotation of driving piece 21 and slowing down, and then make printer head 11 rotate less angle, be convenient for control. The reduction box 22 in this embodiment is a worm gear reducer, the first transmission member is a worm, the second transmission member is a worm wheel, and the worm gear reducer is engaged with the worm gear. The worm gear reducer has the advantages of compact mechanical structure, light volume, self-locking function and the like. The reduction box 22 may be replaced with a reduction device such as a gear reducer that can change a transmission ratio. The driver 21 may be a drive for powering an electric motor, an internal combustion engine, etc.

Referring to fig. 1 and 3, an output shaft end of the second transmission member extends into the inner side of the end plate 121, a connection block 14 is sleeved on the output shaft end of the second transmission member extending into the inner side of the end plate 121, the connection block 14 is fixedly connected with an output shaft of the second transmission member through a set screw, and one side of the connection block 14 is fixedly connected with the printing head 11. The driving member 21 can drive the reduction box 22 to work when working, the reduction box 22 drives the second transmission member to rotate after working, and further drives the printing head 11 to rotate for a certain angle, so that the printing head 11 can be adjusted to be lifted and put down conveniently, a main shaft (not shown) is pressed by a thermosensitive wire on the printing head 11 conveniently, and printing is facilitated. Wherein, connecting block 14 also can be fixed in one side of second driving medium output shaft, and connecting block 14 can also be replaced by the connecting rod, and the one end fixed connection of connecting rod is in one side of second driving medium output shaft, and the other end fixed connection of connecting rod is in the one side of beating printer head 11.

Referring to fig. 1 and 2, the tension member 3 includes elastic tension members 31, the elastic tension members 31 are located outside the end plates 121, one end of each elastic tension member 31 is fixedly connected to the structural frame 12, and the other end of each elastic tension member 31 is fixedly connected to the printhead 11. Through setting up the taut piece 31 of elasticity, make between 11 and the structural framework 12 of printer head be in taut state all the time, avoided the action of gravity of 11 of printer head and pressed the second connecting piece, make the fit clearance between first driving medium and the second driving medium increase, the taut piece 31 of elasticity is indirect with first driving medium and second driving medium elastic connection, make also keep taut state between first driving medium and the second driving medium in the reducing gear box 22, the fit clearance between first driving medium and the second driving medium has been reduced, the printing error of 11 of printer head has been reduced, the printing quality has been ensured.

The elastic tension members 31 may also be located inside the end plate 121, and at this time, the distance between one end of the print head 11 and the end plate 121 needs to be adjusted, so as to leave an installation space for the elastic tension members 31. One of the elastic tension members 31 may be located inside the end plate 121 and the other elastic tension member 31 may be located outside the end plate 121, as the case may be. The elastic tensioning piece 31 can also be arranged in the reduction gearbox 22, at the moment, one end of the elastic tensioning piece 31 is fixed on the first transmission piece, the other end of the elastic tensioning piece 31 is fixed on the second transmission piece, the elastic tensioning piece 31 directly tensions the first transmission piece and the second transmission piece, the fit clearance between the first transmission piece and the second transmission piece is reduced, the printing error of the printing head 11 is reduced, and the printing quality is guaranteed.

Referring to fig. 2 and 3, specifically, the end plate 121 is provided with a guide hole 1211, in this embodiment, the guide hole 1211 is a waist-shaped hole, the two ends of the print head 11 close to the end plate 121 are both provided with the sliding columns 111, and the sliding columns 111 are fixedly connected with the print head 11. The sliding column 111 is inserted through the guide hole 1211 and is slidably connected to the guide hole 1211. Through the arrangement of the sliding column 111 and the guide hole 1211, the guide hole 1211 limits the sliding of the sliding column 111, so that the phenomenon that the printing head 11 rotates for many times to generate mechanical abrasion to cause rotation deviation and further influence the abutting main shaft of the printing head 11 is avoided, the guide hole 1211 and the sliding column 111 guarantee the accurate abutting main shaft of the printing head 11, and the printing quality is guaranteed. The elastic tensioning member 31 in this embodiment is a tension spring, the two ends of the elastic tensioning member 31 are both provided with a draw hook 32, and one end of the elastic tensioning member 31 is fixedly connected to the sliding column 111 through the draw hook 32. The top of the structural frame 12 is provided with a lock shaft 125, two ends of the lock shaft 125 penetrate through the end plate 121, and the other end of the elastic tensioning member 31 is fixedly connected to the lock shaft 125 through a hook 32. The end plate 121 is provided with a yielding hole 1212, and the locking shaft 125 penetrates through the yielding hole 1212 and is slidably connected to the yielding hole 1212. By providing the offset hole 1212, a space for the latch shaft 125 to move is reserved, so that the latch shaft 125 can be conveniently engaged with a card slot (not shown) of the printer. The elastic tensioning piece 31 is used for tensioning the lock shaft 125, so that the lock shaft 125 is not easy to shake when being clamped in the clamping groove, and the structural frame 12 is convenient to fix.

The guide hole 1211 may be a square, oval or other irregular hole, and the guide hole 1211 is allowed to have a sliding space for the sliding column 111, so that the print head 11 can rotate. The elastic tension member 31 may be made of a material having elastic deformation properties such as an elastic cord. The sliding post 111 may also be pivotally connected to the printhead 11, and the offset aperture 1212 may be a square, oval, or other irregular shaped aperture. The elastic tension member 31 may have one end fixed to the sliding column 111 and the other end fixed to the end plate 121, and at this time, a set of second tension members may be added, one end of the second tension members is fixedly connected to the latch shaft 125, and the other end of the second tension members is fixedly connected to the end plate 121.

Referring to fig. 3 and 4, the thermal head assembly according to an embodiment of the present invention further includes a control unit 4 for controlling the stop of the rotation of the printing head 11, and the control unit 4 is located inside the end plate 121. The stop rotation of the printing head 11 is controlled by the arranged control part 4, so that the damage of the printing head 11 caused by the fact that the printing head 11 collides with the structural frame 12 due to the overlarge rotation angle of the printing head 11 is avoided, and the control part 4 plays a role in protecting the printing head 11 to a certain extent.

Referring to fig. 3 to 5, specifically, the control part 4 includes a sensor 41 transmitting a signal, and a connection piece 42 contactable with and disengageable from the sensor 41, the sensor 41 being located inside the end plate 121, the connection piece 42 being located at one end of the print head 11. The sensor 41 includes a fixing portion 411 and a connecting portion 412, the fixing portion 411 is fixedly connected to the inner side of the end plate 121, the connecting portion 412 is located on one side of the fixing portion 411 close to the print head 11, a sliding groove 4121 is formed in the connecting portion 412, and the connecting piece 42 contacts with the sliding groove 4121 and is slidably connected to the sliding groove 4121. The connecting piece 42 is provided with a groove 421, and the connecting part 412 can be positioned in the groove 421 and separated from the connecting piece 42. When printing is finished, the driving box 2 drives the printing head 11 to rotate, and when the printing head 11 rotates to a state that the connecting piece 42 is separated from the sensor 41, that is, the connecting part 412 is located in the groove 421, the driving box 2 stops working, so that the printing head 11 stops rotating. The arrangement of the sensor 41 and the connecting piece 42 controls the rotation of the print head 11, prevents the print head 11 from hitting the structural frame 12, and protects the print head 11.

The sensor 41 may also be located outside the end plate 121, and the position of the corresponding connecting piece 42 is also adjusted so that the connecting piece 42 can contact with the connecting portion 412. The connecting portion 412 may not be provided with the sliding groove 4121, as long as the connecting piece 42 can contact with the connecting portion 412 and be slidably connected to the connecting portion 412.

When the printer starts to print, the driving box 2 is started, the printing head 11 is driven by the driving box 2 to rotate and press the main shaft, and the specific pressure is set and controlled by an external computer. When printing is finished, the printing head 11 is driven by the driving box 2 to rotate until the connecting sheet 42 is separated from the sensor 41, and then the reduction box 22 stops working, so that the printing head 11 stops rotating.

Referring to fig. 1 and 5, the thermal printing component 1 further includes a heat dissipating member 13, the heat dissipating member 13 is located on the top of the print head 11, in this embodiment, the heat dissipating member 13 is a heat dissipating fan, the print head 11 generates a certain amount of heat during operation, the print head 11 is easily damaged when the temperature is too high, by providing the heat dissipating member 13, the print head 11 can be cooled in time, the temperature of the print head 11 is prevented from being too high, and the heat dissipating member 13 plays a role in protecting the print head 11. The heat sink 13 may also be located at one side of the print head 11, and the specific mounting position thereof may be adjusted according to actual conditions.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A thermal head assembly comprises a thermal printing component (1) and a driving box (2) for driving the thermal printing component (1) to rotate, wherein a first transmission piece and a second transmission piece meshed with the first transmission piece are arranged in the driving box (2), and the shaft end of an output shaft of the second transmission piece is fixedly connected with the thermal printing component (1).

2. A thermal head assembly according to claim 1, characterised in that the tensioning member (3) comprises an elastic tensioning member (31), in that the thermal printing member (1) comprises a structural frame (12) and a printing head (11) housed in the structural frame (12) and rotatably connected to the structural frame (12), in that one end of the elastic tensioning member (31) is fixedly connected to the structural frame (12) and in that the other end of the elastic tensioning member (31) is fixedly connected to the printing head (11), in that the printing head (11) is fixedly connected to the output shaft end of the second transmission member.

3. A thermal head assembly according to claim 2, characterised in that the structural frame (12) comprises a set of oppositely disposed end plates (121), the drive casing (2) being disposed outside the end plates (121), the printhead (11) being located inside the end plates (121), the output shaft ends of the second transmission members extending inside the end plates (121) and being fixedly connected to the printhead (11).

4. The thermal head assembly as claimed in claim 3, wherein the end plate (121) has a guide hole (1211), the print head (11) has sliding posts (111) disposed at both ends of the end plate (121), and the sliding posts (111) are inserted into the guide hole (1211) and slidably connected to the guide hole (1211).

5. A thermal head assembly according to claim 1, wherein the drive casing (2) includes a drive member (21) and a reduction casing (22) connected to an output shaft end of the drive member (21), the first transmission member and the second transmission member being located in the reduction casing (22).

6. A thermal head assembly according to claim 3 or 4, further comprising a control member (4) for controlling the stop of the rotation of the print head (11), the control member (4) being located inside the end plate (121).

7. A thermal head assembly according to claim 6, characterised in that the control member (4) comprises a sensor (41) for transmitting a touch signal and a connecting piece (42) which can be brought into contact with or disengaged from the sensor (41), the sensor (41) being located inside the end plate (121) and the connecting piece (42) being located at one end of the print head (11).

8. A thermal head assembly according to claim 7, characterised in that the connecting tab (42) is provided with a recess (421), the connecting tab (42) being slidably connected to the sensor (41), the sensor (41) being located in the recess (421) and being detachable from the connecting tab (42).

9. A thermal head assembly according to claim 1, wherein the thermal printing component (1) further comprises a heat sink (13), the heat sink (13) being located on top of the print head (11).