A printer core and a printer

Abstract

The utility model discloses a printer core and printer, a printer core, including frame body, printing roller, paper feed roller, motor, drive gear, first reduction gear train and second reduction gear train, frame body is suitable for supporting paper feed roller and printing roller to realize the supporting effect, frame body is equipped with the first side wall, second side wall of the layout along left and right directions, and the motor is connected to the first side wall and is located between the first side wall and the second side wall. The output shaft of motor penetrates the first side wall and is connected with drive gear, and drive gear drives printing roller and paper feed roller to rotate through first reduction gear train and second reduction gear train respectively, because printing roller and paper feed roller are driven respectively through first reduction gear train and second reduction gear train, compared with the drive printing roller and paper feed roller through the same reduction gear train, the required transmission distance is shorter, and the thickness of first reduction gear train and second reduction gear train is smaller than the thickness of the same reduction gear train, thereby reducing the thickness of printer core along left and right directions.

Description

Technical Field

[0001] This utility model relates to the field of printing equipment, specifically to a printer core and a printer. Background Technology

[0002] In existing technologies, to reduce costs, the rotation of the paper feed roller and the printing roller is typically driven by a single motor. However, in these existing methods, the motor is mounted on the outer side of the printhead, resulting in a large space occupation and thus increasing the width of the printhead. Furthermore, the paper feed roller and the printing roller are driven by a set of reduction gears connected to the motor's output shaft, which increases the transmission distance between the motor's output shaft and the paper feed roller or printing roller. To meet the operating speed requirements of the paper feed roller and the printing roller, the overall thickness of the reduction gear system needs to be increased, further increasing the width of the printhead. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned defects or problems existing in the background art or to provide a material basis for overcoming the above-mentioned defects or problems existing in the background art, and to provide a printer core and a printer.

[0004] To achieve the above objectives, the present invention and its preferred embodiments adopt the following technical solutions, but the embodiments are not limited to the following solutions:

[0005] Option 1: A printer core, comprising a frame, a printing roller, a paper feed roller, a motor, a drive gear, a first reduction gear system, and a second reduction gear system;

[0006] The frame is adapted to support the paper feed roller and the printing roller; the frame is provided with a first side wall and a second side wall arranged in the left-right direction, the motor is connected to the first side wall and located between the first side wall and the second side wall, the output shaft of the motor passes through the first side wall and is connected to the drive gear; the drive gear drives the printing roller and the paper feed roller to rotate through the first reduction gear system and the second reduction gear system respectively.

[0007] Option 2, based on Option 1, involves the gears in the first and second reduction gear systems being double gears with a two-layer structure, and multiple double gears originating from the same plane.

[0008] Option 3, based on Option 1, has the motor's output shaft located between the printing roller and the paper feed roller in the front-to-back direction.

[0009] Option 4, based on Option 3, involves both the printing roller and the paper feed roller being located on the same side of the motor's output shaft in the vertical direction.

[0010] Option 5, based on Option 1, further includes a sensing element. The frame is provided with a paper feed gap, and the frame is provided with a plurality of detection holes suitable for sensing by the sensing element. The second side wall is provided with a first wire pass hole and a second wire pass hole. The first wire pass hole and the second wire pass hole are respectively located on the upper and lower sides of the paper feed gap, and are suitable for the flexible circuit strip connected to the sensing element to pass through the first wire pass hole and the second wire pass hole in sequence to the detection hole.

[0011] Option 6, based on Option 5, further includes a hot head and a first biasing member. The first and second sidewalls are provided with a first support portion for supporting the printing roller, and the frame is also provided with a second support portion for supporting the paper feed roller. The frame also includes a support plate and a connecting block. The upper surface of the support plate is used to support the printing medium. The two ends of the support plate and the connecting block are connected to the first and second sidewalls. The first and second sidewalls are also provided with a third support portion in front of the support plate for supporting the swing end of the hot head. The first support portion is located below the third support portion. The connecting block is located above the third support portion to allow the first biasing member to press the hot head against the printing roller. The support plate is provided with a first opening for the paper feed roller to extend into. The frame is also provided with a second limiting portion, which opens forward to allow the support end of the hot head to be inserted.

[0012] Option 7, based on Option 6, further includes a protruding plate that protrudes from the support plate; the first support portion includes a first shaft hole on the first side wall and a second shaft hole on the second side wall; the second support portion includes a third shaft hole on the first side wall and a fourth shaft hole on the protruding plate.

[0013] Option 8, based on Option 6, further includes a connecting cavity in the frame, with the rearward opening of the second limiting part communicating with the connecting cavity to allow the flexible circuit strip connected to the hot head to enter the connecting cavity. The connecting cavity, the paper feed gap, and the detection hole are arranged sequentially from top to bottom, and the first wire feed hole communicates with the connecting cavity.

[0014] Option 9, based on Option 8, involves connecting the first sidewall power supply unit at a location on the side of the connecting cavity facing the first sidewall.

[0015] Option 10: A printer includes a paper tray, a second biasing member, a pressing member, and a printer core as described in any one of Options 1 to 9. The paper tray is fixedly connected to the frame and located above the frame. The two ends of the second biasing member act on the pressing member and the frame respectively, so that the pressing member abuts against the paper feed roller.

[0016] As can be seen from the above description of the present invention and its preferred embodiments, compared with the prior art, the technical solution of the present invention and its preferred embodiments have the following beneficial effects due to the adoption of the following technical means:

[0017] 1. In Scheme 1 and its preferred embodiments, a printer core includes a frame, a printing roller, a paper feed roller, a motor, a drive gear, a first reduction gear system, and a second reduction gear system;

[0018] The frame is designed to support the paper feed roller and the printing roller to achieve a supporting effect. The frame has a first sidewall and a second sidewall arranged in the left-right direction. The motor is connected to the first sidewall and located between the first and second sidewalls. Therefore, it can overcome the problem that when the motor protrudes from the second sidewall away from the first sidewall, the thickness of the print core in the left-right direction increases. The output shaft of the motor passes through the first sidewall and is connected to the drive gear. The drive gear drives the printing roller and the paper feed roller to rotate through the first reduction gear system and the second reduction gear system, respectively. Since the printing roller and the paper feed roller are driven by the first reduction gear system and the second reduction gear system, respectively, the required transmission distance is shorter than that when the printing roller and the paper feed roller are driven by the same reduction gear system. Therefore, the thickness of the first reduction gear system and the second reduction gear system is smaller than that when the reduction gear system is the same, thereby reducing the thickness of the print core in the left-right direction.

[0019] 2. In Scheme 2 and its preferred embodiments, the gears in the first and second reduction gear systems are double gears with a two-layer structure, and multiple double gears originate from the same plane. That is, the multiple double gears do not need to be staggered, making the entire gear set a two-layer structure, thus reducing the width space occupied by the gears and resulting in a smaller product width.

[0020] 3. In Scheme 3 and its preferred embodiments, if the printing roller and the paper feed roller are located on the same side of the motor's output shaft, a clearance space is provided to prevent interference between the first and second reduction gear systems, which increases the thickness of the print core. In this embodiment, the motor's output shaft is located between the printing roller and the paper feed roller in the front-rear direction, reducing the clearance space and making the print core thinner.

[0021] 4. In Scheme 4 and its preferred embodiments, if the printing roller and the paper feed roller are located on the upper or lower side of the motor's output shaft at the same time, the thickness of the printer core can be further reduced.

[0022] 5. In Scheme 5 and its preferred embodiments, when the circuit strip connected to the sensor needs to bypass the paper feed gap, there is a problem with the difficulty in arranging the wiring. By providing a first wire guide hole and a second wire guide hole on the second sidewall, with the first and second wire guide holes located on the upper and lower sides of the paper feed gap respectively, the flexible circuit strip connected to the sensor can pass through the first and second wire guide holes sequentially to the detection hole, thereby connecting with the sensor. Furthermore, since the first and second wire guide holes are directly provided on the second sidewall, the flexible circuit strip connected to the sensor is installed using the outer surface of the second sidewall, eliminating the need for a vertical through hole connecting the first and second wire guide holes, making processing more convenient. Simultaneously, the thickness of the second sidewall does not need to be increased, resulting in a smaller thickness of the printer in the left-right direction. Moreover, this wiring method avoids the paper feed gap and will not affect the paper within the gap.

[0023] 6. In Scheme 5 and its preferred embodiments, a heating head and a first biasing member are further included. The first sidewall and the second sidewall are provided with a first support portion for supporting the printing roller, and the frame is also provided with a second support portion for supporting the paper feed roller. The frame is also provided with a support plate and a connecting block. The upper surface of the support plate is used to support the printing medium. The two ends of the support plate and the connecting block are connected to the first sidewall and the second sidewall. The first sidewall and the second sidewall are also provided with a third support portion for supporting the swing end of the heating head in front of the support plate. The first support portion is located below the third support portion. The connecting block is located above the third support portion so that the heating head can be pressed against the first biasing member of the printing roller. The support plate is provided with a first opening for the paper feed roller to extend into. The frame is also provided with a paper passage gap and a second limiting portion. The second limiting portion opens forward so that the support end of the heating head can be inserted.

[0024] The printing assembly is configured as follows: A first support portion and a third support portion are provided on the first and second sidewalls. The first support portion supports the printing roller, providing support for the printing roller. A connecting block is located above the third support portion to allow a first biasing member to press the heating head against the printing roller, ensuring the heating head is tightly pressed against the printing roller. The third support portion restricts the position of the heating head's swinging end. A second limiting portion is provided on the upper frame. The second limiting portion opens forward to allow the support end of the heating head to be inserted. The second limiting portion supports the support end of the heating head, thereby supporting the heating head and allowing it to swing under the action of the paper or the first biasing member.

[0025] Paper feed gap setting: The frame is equipped with a paper feed gap. The frame is equipped with a second support, and the support plate has a first opening for the paper feed roller to extend into, so that the paper feed roller rotates to feed paper, and the printing medium above the first opening is driven to extend into the paper feed gap. Since the paper feed end of the paper feed gap is precisely designed to allow only one sheet of printing medium to pass through at a time, only one sheet of printing medium will pass through the paper feed gap and enter the position of the printing roller at a time.

[0026] 7. In Scheme 7 and its preferred embodiments, the frame further includes a convex plate that protrudes from the support plate; the first support portion includes a first shaft hole on the first side wall and a second shaft hole on the second side wall; the second support portion includes a third shaft hole on the first side wall and a fourth shaft hole on the convex plate, thereby realizing the support of the paper feed roller and the printing roller.

[0027] 8. In Scheme 8 and its preferred embodiments, the frame is further provided with a connecting cavity, and the rearward opening of the second limiting part communicates with the connecting cavity, so that the flexible circuit strip connected to the hot head can enter the connecting cavity, thereby realizing the setting of the flexible circuit strip connected to the hot head.

[0028] Normally, a pressure member is located below the support plate to hold the paper between the pressure member and the paper feed roller. Therefore, to avoid the position of the pressure member affecting the sensing function, the sensor is usually not installed on the side of the pressure member. Thus, the sensor needs to sense from bottom to top. For ease of unified control, the flexible circuit strip connected to the heating head and the flexible circuit strip connected to the sensor are usually integrated. However, since the paper feed gap and detection holes are arranged sequentially from top to bottom, the flexible circuit strips connected to the heating head and the sensor will be located on the upper and lower sides of the support plate respectively, presenting a problem in terms of arrangement. This design incorporates a first and a second wire guide hole on the second sidewall, located on the upper and lower sides of the support plate, respectively. This allows the flexible circuit strip connected to the sensor to sequentially pass through the connecting cavity, the first wire guide hole, and the second wire guide hole to the detection hole, thus connecting with the sensor. Because the first and second wire guide holes are directly located on the second sidewall, and the flexible circuit strip connecting to the sensor is mounted on the outer surface of the second sidewall, there is no need for a vertical through hole connecting the first and second wire guide holes, simplifying manufacturing. Furthermore, the thickness of the second sidewall does not need to be increased, resulting in a thinner printer in the left-right direction. This wiring method also avoids the paper feed gap, preventing interference with the paper within the gap.

[0029] 9. In Scheme 9 and its preferred embodiments, the position of the first sidewall power supply motor connection is located on the side of the connection cavity facing the first sidewall, so as to connect the flexible circuit strip connected to the motor and the flexible circuit strip connected to the heat head into one unit. The flexible circuit strip connected to the motor can extend from the connection cavity to connect to the motor, thereby facilitating installation and control.

[0030] 10. A printer includes a paper tray, a second biasing member, a pressing member, and the aforementioned printer core. The paper tray is fixedly connected to a frame and located above the frame. The two ends of the second biasing member act on the pressing member and the frame, respectively, so that the pressing member abuts against the paper feed roller, thereby realizing paper feeding. It also has the beneficial effects brought about by the aforementioned printer core. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a perspective view of the printer portion of the structure in Example 1;

[0033] Figure 2 This is a structural diagram of the printer portion of the device in Example 1;

[0034] Figure 3 This is a perspective view of the front side of the printer cartridge in Example 1;

[0035] Figure 4 This is a perspective view of the upper side of the printer cartridge in Example 1;

[0036] Figure 5 This is a perspective view of the side end of the printer cartridge in Example 1;

[0037] Figure 6 This is a perspective view of the rack in Example 1;

[0038] Figure 7 This is a perspective view of the underside of the frame in Example 1;

[0039] Figure 8 This is a side view of the rack in Example 1;

[0040] Figure 9 This is a top view of the rack in Example 1;

[0041] Figure 10 This is a three-dimensional view of the shelf in Example 1;

[0042] Figure 11 This is a three-dimensional view of the shelf above in Example 1;

[0043] Figure 12 This is a perspective view of the side cover in Embodiment 1;

[0044] Figure 13 This is a top view of the transmission gear in Example 1;

[0045] Figure 14 This is a perspective view of the heat head in Example 1;

[0046] Figure 15 This is a perspective view of the transmission gear in Example 1.

[0047] Explanation of key figure labels:

[0048] Frame 1; Support plate 11; First opening 111; Detection hole 112; First side wall 12; Gear cavity 121; First limiting hole 122; First shaft hole 123; Third shaft hole 124; Output hole 125; Protrusion plate 13; Fourth shaft hole 131;

[0049] Second sidewall 14; second limiting hole 141; second shaft hole 142; first wire through hole 143; second wire through hole 144;

[0050] Connecting block 15; elastic mounting part 16; elastic locking protrusion 161;

[0051] 2. Upper shelf; 21. First limiting part; 22. Second limiting part; 221. Limiting protrusion; 23. Connecting cavity; 231. First outlet; 232. Guide arc surface; 233.

[0052] Motor cavity 24;

[0053] Side cover 3; heating head 4; swing part 41; support end 42; first biasing member 5; transmission gear 6; drive gear 61; first drive wheel 611; second drive wheel 612; first reduction gear system 62; first reduction wheel 621; second reduction wheel 622; third reduction wheel 623; second reduction gear system 63; fourth reduction wheel 631; fifth reduction wheel 632; sixth reduction wheel 633; ​​printing roller 7; motor 8; paper feed roller 9; sensing element 10; flexible circuit belt 20; paper tray 30; second biasing member 40; pressing member 50; paper feed gap 60; Detailed Implementation

[0054] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are preferred embodiments of the present utility model and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0055] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.

[0056] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this utility model, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of the invention.

[0057] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.

[0058] In the claims, description and accompanying drawings of this utility model, the terms "comprising," "having," and variations thereof are used to mean "including but not limited to."

[0059] refer to Figures 1-14 A printer includes a printer core, a paper tray 30, a second biasing component 40, and a pressing component 50.

[0060] The printer core includes a frame, a heating head 4, a first biasing component 5, a transmission gear 6, a printing roller 7, a motor 8, a paper feed roller 9, a sensing component 10, a flexible circuit strip 20, a drive gear 61, a first reduction gear system 62, a second reduction gear system 63, and a side cover 3.

[0061] The frame is adapted to support the paper feed roller 9 and the printing roller 7. The frame includes the frame 1 and the upper frame 2.

[0062] refer to Figures 6-9 The frame 1 includes a support plate 11, a first side wall 12, a second side wall 14, a connecting block 15, an elastic mounting part 16, and a protruding plate 13 that are connected to each other.

[0063] The two ends of the support plate 11 are connected to the first side wall 12 and the second side wall 14. The upper surface of the support plate 11 is used to support the printing medium. The support plate 11 is provided with a first opening 111 for the paper feed roller 9 to extend into. The connecting block 15 connects the first side wall 12 and the second side wall 14. The connecting block 15 is located above the third support part so as to allow the hot head 4 to be pressed against the first biasing member 5 of the printing roller 7.

[0064] refer to Figure 9The support plate 11 of the frame is also provided with a plurality of detection holes 112 suitable for the sensor 10 to sense from bottom to top. In this embodiment, there are two detection holes 112, which are arranged in the front-back direction and are both located on the side of the first opening 111 near the second side wall 14. Furthermore, one detection hole 112 and the first opening 111 are arranged sequentially along an axis parallel to the left-right direction, so that the sensor 10 installed thereon can sense the presence of paper. An elastic mounting part 16 protrudes from the lower surface of the support plate 11 and is used to mount and fix the sensor 10. The number of elastic mounting parts 16 is the same as the number of detection holes 112 and they are arranged corresponding to the detection holes 112. The elastic mounting part 16 is provided with an elastic protrusion 161.

[0065] The protruding plate 13 protrudes from the lower surface of the support plate 11 and is used to support the paper feed roller 9. It is arranged sequentially with the first opening 111 along an axis parallel to the left and right direction, and the protruding plate 13 is located between the first opening 111 and one of the detection holes 112.

[0066] The first sidewall 12 and the second sidewall 14 are arranged at intervals in the left-right direction.

[0067] refer to Figure 6 The first sidewall 12 is provided with a gear cavity 121 that opens outward in the left and right direction (i.e., away from the first sidewall 12). The gear cavity 121 is suitable for accommodating the transmission gear 6. The first sidewall 12 is also provided with a gear shaft that protrudes from the gear cavity 121 for the transmission gear 6 to be fitted.

[0068] The first sidewall 12 and the second sidewall 14 are further provided with a third support portion in front of the bearing plate 11 to support the swing end of the hot head 4. Specifically, the third support portion has an upward limiting surface to limit its maximum movement position under the action of the first biasing member 5. Preferably, in this embodiment, the third support portion also has a certain anti-detachment function. The third support portion includes a first limiting hole 122 located on the first sidewall 12 and a second limiting hole 141 located on the second sidewall 14. Both are provided with limiting surfaces. The second limiting hole 141 penetrates the second sidewall 14 in the left-right direction and allows the hot head 4 to swing up and down inside it. The through-hole method facilitates better support strength when the second sidewall 14 is thin-walled, thereby allowing the width of the second sidewall 14 to be smaller. The first limiting hole 122 is an L-shaped hole and communicates with the gear cavity 121. The horizontal section of the first limiting hole 122 opens on the front surface of the first sidewall 12, and the vertical section is opposite to and parallel to the second limiting hole 141, allowing the hot head 4 to swing up and down inside it.

[0069] The first sidewall 12 and the second sidewall 14 are provided with a first support portion for supporting the printing roller 7 in front of the support plate 11. The first support portion is located below the third support portion. Specifically, the first support portion includes a first shaft hole 123 on the first sidewall 12 and a second shaft hole 142 on the second sidewall 14. The second shaft hole 142 penetrates the second sidewall 14 in the left-right direction (similar to the above, the through structure can achieve better support and a smaller width). The first shaft hole 123 opens on the front surface of the first sidewall 12 and extends to correspond to the second shaft hole 142. The first shaft hole 123 also connects to the gear cavity 121 to facilitate the injection molding of the printing roller 7 and the frame 1.

[0070] refer to Figure 6 , Figure 7 The frame 1 is also provided with a second support portion suitable for supporting the paper feed roller 9 so that the rotation axis of the paper feed roller 9 is located below the support plate 11. In order to facilitate the transmission of the paper feed roller 9 and not affect the installation of the sensing element 10, in this embodiment, the second support portion includes a third shaft hole 124 located on the first side wall 12 and a fourth shaft hole 131 located on the protrusion plate 13. The third shaft hole 124 communicates with the gear cavity 121 so that the transmission gears 6 can be set in the gear cavity 121 to realize transmission at multiple points, making the structure simpler.

[0071] refer to Figure 6 The first sidewall 12 is provided with an output hole 125 that connects to the gear cavity 121. The output hole 125 is adapted to extend the output end of the motor 8. In the front-back direction, the output hole 125 is located between the second support and the first support, that is, the output hole 125 is located between the first shaft hole 123 and the third shaft hole 124.

[0072] refer to Figure 8 The second sidewall 14 is provided with a first thread guide hole 143 and a second thread guide hole 144, which are located on the upper and lower sides of the support plate 11, respectively. The first thread guide hole 143 and the second thread guide hole 144 are located on the upper and lower sides of the paper feed gap 60, respectively.

[0073] refer to Figure 10 , Figure 11The upper frame 2 is fixedly connected to the frame 1 and located above the frame 1. Specifically, the upper frame 2 and the frame 1 can be fixedly connected by snap-fit ​​and / or screws. The upper frame 2 is provided with a first limiting part 21 and a second limiting part 22, a connecting cavity 23 and a motor cavity 24. The first limiting part 21 is downward close to the support plate 11 and forms a paper passage gap 60 with the support plate 11. The second limiting part 22 is a limiting hole communicating with the connecting cavity 23. The limiting hole extends in the front-back direction and has a forward opening and a rearward opening. The forward opening is for the insertion of the support end 42 of the heating head 4, and the rearward opening is for the flexible circuit strip 20 connected to the heating head 4 to extend into the connecting cavity 23. In order to limit the swing range of the support end 42 of the heating head 4, the second limiting part 22 is also provided with two limiting protrusions 221 arranged vertically and opposite to each other. The support end 42 of the hot head 4 is restricted between the two limiting protrusions 221, so that the support end 42 can be held in the middle. The two ends of the hot head 4 can swing freely and swing with the printing roller 7, which plays an adaptive function. It can ensure that the hot head 4 is in close contact with the printing roller 7, ensure that the pressure of the hot head 4 is consistent, and ensure good printing uniformity.

[0074] The connecting cavity 23, the paper feed gap 60, and the detection hole 112 are arranged sequentially from top to bottom. (Reference) Figure 11 The connecting cavity 23 has an upward-facing first outlet 231. The wall surface of the connecting cavity 23 opposite to the second limiting part 22 has a guiding arc surface 232 suitable for guiding the flexible circuit strip 20 connected to the hot head 4 to the first outlet 231. The wall surface of the connecting cavity 23 opposite to the second limiting part 22 is formed by a number of raised ribs 233 spaced apart in the left-right direction. The connecting cavity 23 communicates with the first wire passage hole 143 so that the flexible circuit strip 20 connected to the sensing element 10 passes through the connecting cavity 23, the first wire passage hole 143, and the second wire passage hole 144 in sequence to the detection hole 112. The motor cavity 24 and the connecting cavity 23 are both located on the upper side, and the motor cavity 24 is located between the first side wall 12 and the connecting cavity 23, and is suitable for accommodating the motor 8. The two ends of the motor cavity 24 are respectively connected to the output hole 125 and the connecting cavity 23.

[0075] like Figure 4 The first sidewall 12 is also connected to the motor 8, and the position where the motor 8 is connected on the first sidewall 12 is located on the end of the connecting cavity 23 facing the first sidewall 12 (both are located on the upper side), and is located between the first sidewall 12 and the second sidewall 14.

[0076] refer to Figure 12 The side cover 3 is fixedly connected to the frame 1 of the frame body to seal the gear cavity 121. The fixing method can be screw connection, snap-fit, etc. The side cover 3 is provided with shaft hole for supporting gear shaft to avoid the reduction in life caused by gear cantilever beam structure.

[0077] like Figure 4The motor 8 is connected to the first sidewall 12 and located between the first sidewall 12 and the second sidewall 14. The output end of the motor 8 is adapted to extend from the output hole 125 (through the first sidewall 12) to connect with the transmission gear 6 of the gear cavity 121. Since the output hole 125 is located between the second support and the first support in the front-rear direction, the output shaft of the motor 8 is located between the printing roller 7 and the paper feed roller 9 in the front-rear direction. Preferably, in the vertical direction, the printing roller 7 and the paper feed roller 9 are both located on the same side of the output shaft of the motor 8, so that the first reduction gear system 62 and the second reduction gear system 63 can also be located on the same side, reducing the space occupied in terms of thickness. In this embodiment, the printing roller 7 and the paper feed roller 9 are located below the output shaft of the motor 8.

[0078] refer to Figure 13 , Figure 15 The transmission gear 6 is housed in the gear cavity 121. The transmission gear 6 includes a drive gear 61, a first reduction gear train 62, and a second reduction gear train 63. The drive gear 61 is anti-rotatingly connected to the output shaft of the motor 8. The drive gear 61 includes a first drive wheel 611 and a second drive wheel 612 that mesh with each other and both rotate along an axis parallel to the left and right direction. The first drive wheel 611 is anti-rotatingly connected to the output shaft of the motor 8. Preferably, the first drive wheel 611 and the second drive wheel 612 are engaged in a speed-reducing mesh. The second drive wheel 612 drives the printing roller 7 and the paper feed roller 9 to rotate through the first reduction gear train 62 and the second reduction gear train 63, respectively. The gears in the first reduction gear train 62 and the second reduction gear train 63 all rotate along an axis parallel to the left and right direction. The first reduction gear train 62 includes a first reduction wheel 621, a second reduction wheel 622, and a third reduction wheel 623 that mesh in sequence. The first reduction wheel 621 meshes with the second drive wheel 612, and the third reduction wheel 623 drives the printing roller 7 to rotate. The second reduction gear system 63 includes a fourth reduction gear 631, a fifth reduction gear 632, and a sixth reduction gear 633 that mesh sequentially. The fourth reduction gear 631 meshes with the second drive gear 612, and the sixth reduction gear 633 drives the paper feed roller 9 to rotate. The second drive gear 612, the first reduction gear 621, the second reduction gear 622, the fourth reduction gear 631, and the fifth reduction gear 632 are a composite structure with input and output teeth, while the first drive gear 611, the third reduction gear 623, and the sixth reduction gear 633 are single-gear structures.

[0079] In this embodiment, the transmission gear 6 spreads outward and backward from the output hole 125. Due to this arrangement, the transmission gear 6, under the condition of satisfying the reduction transmission, is basically equal to the thickness H of the input teeth (one layer) and output teeth (one layer) of the transmission gear 6 (that is, the gears in the first reduction gear system 62 and the second reduction gear system 63 are double gears with a two-layer structure). The multiple double gears start from the same plane, which is equivalent to the gears on the same side of the multiple double gears being located on the same plane. That is, the multiple double gears do not need to be staggered, so that the entire gear set is a two-layer structure.

[0080] In existing technologies, when the first and second support portions are located on the same side of the output hole 125 and the transmission requirements are met, the structure typically consists of at least three layers. Therefore, the structure of this embodiment can be made thinner along the width of the printing core. For example, in Chinese patent CN211518982U, since the motor is located at one end of the outer side of the frame 1, and due to transmission requirements, the driving gear and driven gear of the motor 8 mesh. When the pinion of the driven gear meshes with one gear of the double gear, the other gear of the double gear is located on the other side of the driven gear. The different double gears are staggered, forming a gear set structure with a three-layer thickness. As another example, in CN107639942B, since the motor 8 is located at one end of the outer side of the frame 1, and due to transmission requirements, the double gears in the gear set are staggered, thereby forming a gear thickness of three or four layers.

[0081] refer to Figure 2 , Figure 3 The printing roller 7 is supported by the first support portion. The paper feed roller 9 is supported by the second support portion. The paper feed roller 9 is adapted to extend into the first opening 111. The shaft portion of the paper feed roller 9 can be separately configured to accommodate a clutch structure (this is prior art and will not be described in detail). The clutch structure allows the paper feed roller 9 and the printing roller 7 to be driven by the motor 8 simultaneously, or allows only the printing roller 7 to be driven by the motor 8, while the paper feed roller 9 rotates due to the friction of the paper. The separate configuration of the shaft portion of the paper feed roller 9 also facilitates the installation of the paper feed roller 9 in the third shaft hole 124 and the fourth shaft hole 131.

[0082] refer to Figure 2 , Figure 3 , Figure 4 , Figure 14 The swing end of the hot head 4 is formed by two swing portions 41 protruding from its main body in the left-right direction. The size of the swing portions 41 is slightly smaller than the size of the first limiting hole 122 and the second limiting hole 141, so as to swing up and down. The swing portions 41 are limited by the limiting surface or the printing roller 7, thereby limiting the maximum swing angle. The support end 42 of the hot head 4 is adapted to be inserted into the opening of the second limiting portion 22, and the flexible circuit strip 20 connected to the hot head 4 extends into the connecting cavity 23.

[0083] refer to Figure 5The sensor 10 is mounted on the underside of the support plate 11. The sensor 10 is adapted to deform the elastic latch 161 during installation, so as to pass over the elastic latch 161 and be clamped between the elastic latch 161 and the lower surface of the support plate 11 for fixation. There are two sensors 10, one for sensing whether there is paper and the other for sensing whether the paper is driven by the paper feed roller 9.

[0084] The flexible circuit strip 20 is integrally formed and is suitable for electrical connection with the motor 8, the heating head 4 and the sensing element 10.

[0085] refer to Figure 2 The first biasing element 5 acts on the hot head 4 and the connecting block 15 at both ends. The first biasing element 5 can be a spring, a magnetic component, or other similar parts. In this embodiment, it is a spring.

[0086] refer to Figure 1 , Figure 2 The paper tray 30 is fixed to the frame 1 of the frame and located above the upper frame 2 of the frame. The paper tray 30 can be used to hold paper, and the paper tray 30 covers the upper frame 2, so that the motor cavity 24 is closed. The paper tray 30 is provided with a second outlet (not shown in the figure) that communicates with the first outlet 231, so that the flexible circuit strip 20 connected to the hot head 4 can extend out.

[0087] refer to Figure 1 , Figure 2 In this embodiment, the pressing member 50 is a paper lifting member; in other embodiments, it may refer to a paper separating member, etc.

[0088] refer to Figure 2 The two ends of the second biasing member 40 act on the pressing member 50 and the frame 1 of the frame body, respectively, so that the pressing member 50 abuts against the paper feed roller 9. The second biasing member 40 can be a spring, rubber, etc.

[0089] During installation, secure rack 1 to upper rack 2. (Reference) Figure 3Next, one end of the printing roller 7 is aligned with the second shaft hole 142 at an angle, and the other end is moved closer to the first shaft hole 123 until both ends are installed in the first shaft hole 123 and the second shaft hole 142. At this time, the other end of the printing roller 7 extends into the gear cavity 121 to accommodate the transmission gear 6. Similarly, the flexible circuit strip 20 connected to the hot head 4 is first inserted into the opening of the second limiting part 22 and extends into the connecting cavity 23. Then, the support end 42 of the hot head 4 is inserted into the opening of the second limiting part 22, and at the same time, one swing part 41 is aligned with the second limiting hole 141 at an angle, and the other swing part 41 is moved closer to the first limiting hole 122 until both ends are fully installed in the first limiting hole and the second limiting hole. The first biasing member 5 can be inserted into the installation gap after the hot head 4 is installed, by swinging the hot head 4 downward to create an installation gap between the hot head 4 and the connecting block 15. The motor 8 is installed inside the motor cavity 24. The flexible circuit strip 20 connected to the motor 8 extends from the connecting cavity 23 into the motor cavity 24 and connects to the motor 8. The transmission gear 6 is installed on the gear cavity 121, so that the side cover 3 is fixed to the frame 1 and the gear cavity 121 is closed. The sensor 10 engages with the elastic latch 161 and is located at the detection point. The flexible circuit strip 20 connected to the sensor 10 passes through the connecting cavity 23, the first wire hole 143, and the second wire hole 144 in sequence to the detection hole 112 and connects to the sensor 10. Then, the pressing member 50, the paper tray member 30, and the second biasing member 40 are installed to complete the installation.

[0090] With the aforementioned frame, the motor 8 and transmission gear 6, the printing components, the paper feed gap 60, the flexible circuit strip 20, and the sensor 10 can all be installed using only the frame 1 and the upper frame 2, resulting in a simple structure. Furthermore, due to the mounting position of the motor 8 and the arrangement of the first reduction gear system 62 and the second reduction gear system 63, the printer core can be made smaller in width and thickness.

[0091] Compared with the prior art, this embodiment has the following beneficial effects:

[0092] In one exemplary embodiment, a printer core includes a frame, a printing roller 7, a paper feed roller 9, a motor 8, a drive gear 61, a first reduction gear system 62, and a second reduction gear system 63.

[0093] The frame is adapted to support the paper feed roller 9 and the printing roller 7 to achieve a supporting effect. The frame has a first sidewall 12 and a second sidewall 14 arranged in the left-right direction. The motor 8 is connected to the first sidewall 12 and located between the first sidewall 12 and the second sidewall 14. Therefore, it can overcome the problem that when the motor 8 protrudes from the second sidewall 14 in a direction away from the first sidewall 12, the thickness of the printer core in the left-right direction increases. The output shaft of the motor 8 passes through the first sidewall 12 and is connected to the drive gear 61. The drive gear 61 drives the printing roller 7 and the paper feed roller 9 to rotate through the first reduction gear system 62 and the second reduction gear system 63, respectively. Since the printing roller 7 and the paper feed roller 9 are driven by the first reduction gear system 62 and the second reduction gear system 63, respectively, the required transmission distance is shorter than that when the printing roller 7 and the paper feed roller 9 are driven by the same reduction gear system. Therefore, the thickness of the first reduction gear system 62 and the second reduction gear system 63 will be smaller than that when the same reduction gear system is used, thereby reducing the thickness of the printer core in the left-right direction.

[0094] In one exemplary embodiment, the gears in the first reduction gear system 62 and the second reduction gear system 63 rotate along an axis parallel to the left and right direction, which facilitates the transmission of the gears and makes the structure simple. The gears in the first reduction gear system 62 and the second reduction gear system 63 have a two-layer structure, which makes the width space occupied by the gears smaller and the product width smaller.

[0095] In one exemplary embodiment, if the printing roller 7 and the paper feed roller 9 are located on the same side of the output shaft of the motor 8, a clearance space is provided to prevent interference between the first reduction gear system 62 and the second reduction gear system 63, which increases the thickness of the printing core. In this embodiment, the output shaft of the motor 8 is located between the printing roller 7 and the paper feed roller 9 in the front-rear direction, reducing the clearance space and making the printing core thinner. Furthermore, if the printing roller 7 and the paper feed roller 9 are located on the upper or lower side of the output shaft of the motor 8, the thickness of the printing core can be further reduced.

[0096] In one exemplary embodiment, when the circuit strip 20 connected to the sensor 10 needs to bypass the paper feed gap 60, there is a problem of difficulty in its arrangement and exposure. By providing a first wire pass hole 143 and a second wire pass hole 144 on the second sidewall 14, with the first wire pass hole 143 and the second wire pass hole 144 located on the upper and lower sides of the paper feed gap 60 respectively, the flexible circuit strip 20 connected to the sensor 10 is adapted to pass through the first wire pass hole 143 and the second wire pass hole 144 sequentially to the detection hole 112, thereby connecting with the sensor 10. Furthermore, due to this arrangement... The first wire guide hole 143 and the second wire guide hole 144 are directly provided on the second sidewall 14. The flexible circuit strip 20 connected to the sensor 10 is installed using the outer surface of the second sidewall 14. Therefore, there is no need to provide a vertical through hole connecting the first wire guide hole 143 and the second wire guide hole 144. If a vertical through hole were added, it would be necessary to avoid the paper feed gap 60 (equivalent to the traditional paper feed path), which would inevitably increase the width of the machine core. This makes the manufacturing process more convenient, and at the same time, the thickness of the second sidewall 14 does not need to be increased, thus making the printer thinner in the left-right direction. Moreover, this wire feeding method avoids the paper feed gap 60 and will not affect the paper within the paper feed gap 60.

[0097] In one exemplary embodiment, the frame includes a frame 1 and an upper frame 2. The frame 1 includes a support plate 11, a first side wall 12, a second side wall 14, and a connecting block 15 that are integrally connected to each other. This reduces the number of parts, increases connection strength, and facilitates the setting of corresponding functions.

[0098] To achieve the configuration of the motor 8 and the transmission gear 6: the first sidewall 12 is connected to the motor 8 and has a gear cavity 121 that opens outward in the left and right direction to accommodate the transmission gear 6.

[0099] The printing assembly is configured as follows: The first sidewall 12 and the second sidewall 14 are provided with a first support portion and a third support portion in front of the support plate 11. The first support portion supports the printing roller 7, providing support for the printing roller 7. The connecting block 15 is located above the third support portion to allow the hot head 4 to be pressed against the printing roller 7 by the first biasing member 5, ensuring the hot head 4 is tightly against the printing roller 7. The third support portion restricts the position of the swing end of the hot head 4. The upper frame 2 is provided with a second limiting portion 22, which opens forward to allow the support end 42 of the hot head 4 to be inserted. The second limiting portion 22 supports the support end 42 of the hot head 4, thereby supporting the hot head 4 and allowing the hot head 4 to swing under the action of the paper or the first biasing member 5.

[0100] To achieve the paper feed gap 60 setting: The upper surface of the support plate 11 is used to support the printing media. The upper frame 2 is provided with a first limiting part 21, which moves downwards towards the support plate 11 and forms a paper feed gap 60 with the support plate 11. Since the upper frame 2 is fixedly connected to the frame 1 and located above the frame 1, the fixed connection ensures that the size of the paper feed gap 60 between the two is stable, ensuring smooth paper feeding. The frame 1 is provided with a second support part that supports the paper feed roller 9 so that the rotation axis of the paper feed roller 9 is located below the support plate 11. The support plate 11 is provided with a first opening 111 for the paper feed roller 9 to extend into, so that the paper feed roller 9 rotates to achieve paper feeding, and the printing media above the first opening 111 is driven to extend into the paper feed gap 60. Since the paper feed end of the paper feed gap 60 is precisely designed to allow only one printing medium to pass through, only one printing medium will pass through the paper feed gap 60 at a time and enter the position of the printing roller 7.

[0101] Integrating multiple functions into two parts facilitates assembly and reduces manufacturing costs.

[0102] In one exemplary embodiment, the frame further includes a protruding plate 13 that protrudes from the support plate 11; the first support portion includes a first shaft hole 123 located on the first side wall 12 and a second shaft hole 142 located on the second side wall 14; the second support portion includes a third shaft hole 124 located on the first side wall 12 and a fourth shaft hole 131 located on the protruding plate 13, thereby supporting the paper feed roller 9 and the printing roller 7.

[0103] In one exemplary embodiment, the frame also includes a connecting cavity 23, and the rearward opening of the second limiting part 22 communicates with the connecting cavity 23 to allow the flexible circuit strip 20 connected to the heating head 4 to enter the connecting cavity 23, thereby enabling the flexible circuit strip 20 connected to the heating head 4 to extend into the connecting cavity 23 and thus realize the setting of the flexible circuit strip 20 connected to the heating head 4. Since a pressing member 50 is typically provided below the support plate 11 to hold the paper between the pressing member 50 and the paper feed roller 9, to avoid the position of the pressing member 50 affecting the sensing of the sensor 10, the sensor 10 is usually not installed on the side of the pressing member 50; therefore, the sensor 10 needs to sense from bottom to top. For ease of unified control, the flexible circuit strip 20 connected to the heat head 4 and the flexible circuit strip 20 connected to the sensing element 10 are usually connected as one unit. However, since the paper gap 60 and the detection hole 112 are arranged sequentially from top to bottom, the flexible circuit strip 20 connected to the heat head 4 and the flexible circuit strip 20 connected to the sensing element 10 will be located on the upper and lower sides of the support plate 11 respectively, which presents a problem of difficult arrangement. This design incorporates a first wire-passing hole 143 and a second wire-passing hole 144 on the second sidewall 14. These holes are located on the upper and lower sides of the support plate 11, respectively. This allows the flexible circuit strip 20, connected to the sensing element 10, to sequentially pass through the connecting cavity 23, the first wire-passing hole 143, and the second wire-passing hole 144 to the detection hole 112, thus connecting with the sensing element 10. Since the first and second wire-passing holes 143 and 144 are directly located on the second sidewall 14, and the flexible circuit strip 20 is mounted on the outer surface of the second sidewall 14, there is no need for a vertical through hole connecting the first and second wire-passing holes 143 and 144. This simplifies manufacturing and reduces the thickness of the second sidewall 14, resulting in a thinner printer in the left-right direction. Furthermore, this wiring method avoids the paper feed gap 60, preventing any impact on the paper within the gap.

[0104] In one exemplary embodiment, the motor 8 is connected to the first sidewall 12 at the side of the connecting cavity 23 facing the first sidewall 12, so as to connect the flexible circuit strip 20 connected to the motor 8 and the flexible circuit strip 20 connected to the heat head 4 into one unit. The flexible circuit strip 20 connected to the motor 8 can extend from the connecting cavity 23 and connect to the motor 8, thereby facilitating installation and control.

[0105] In one exemplary embodiment, a side cover 3 is also included. The first sidewall 12 is provided with a gear cavity 121 suitable for accommodating the drive gear 61, the first reduction gear train 62, and the second reduction gear train 63. The side cover 3 is fixedly connected to the frame to seal the gear cavity 121, thereby protecting the gears and preventing water and dust from damaging the transmission gear 6. Furthermore, the side cover 3 is provided with a shaft hole for supporting the gear shaft (protruding from the gear cavity 121 for the transmission gear 6 to be fitted). This shaft hole can prevent the gear shaft from maintaining a cantilever beam stress state, thereby improving the service life of the gear shaft.

[0106] In one exemplary embodiment, the flexible circuit strip 20 is configured such that when the support end 42 of the hot head 4 is inserted into the second limiting part 22, the flexible circuit strip 20 connected to the hot head 4 automatically approaches the first outlet 231 and extends out of the first outlet 231 under the guidance of the guiding arc surface 232, so that when the opening of the second limiting part 22 is perpendicular to the first outlet 231, there is no need to manually correct the posture of the flexible circuit strip 20, making installation more convenient.

[0107] In one exemplary embodiment, the wall surface opposite to the connecting cavity 23 and the second limiting part 22 is formed by a plurality of raised ribs 233 spaced apart in the left-right direction, which reduces the contact area between the guide arc surface 232 and the flexible circuit strip 20, reduces the possibility of adhesion, and makes the installation of the flexible circuit strip 20 connected to the heat head 4 easier.

[0108] In one exemplary embodiment, a printer includes a paper tray 30, a second biasing member 40, a pressing member 50, and the aforementioned printer core. The paper tray 30 is fixedly connected to a frame and located above the frame. The two ends of the second biasing member 40 act on the pressing member 50 and the frame, respectively, so that the pressing member 50 abuts against the paper feed roller 9, thereby realizing paper feeding. It also possesses the beneficial effects brought about by the aforementioned printer core.

[0109] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this utility model, but does not constitute a limitation on the scope of protection of this utility model. Modifications, equivalent substitutions, or other improvements to the embodiments of this utility model or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this utility model or the foregoing embodiments, should all be included within the scope of protection of this utility model.

Claims

1. A printer cartridge, characterized in that: It includes a frame, a printing roller (7), a paper feed roller (9), a motor (8), a drive gear, a first reduction gear system, and a second reduction gear system; The frame is adapted to support the paper feed roller (9) and the printing roller (7); the frame is provided with a first side wall (12) and a second side wall (14) arranged in the left and right direction, the motor (8) is connected to the first side wall (12) and located between the first side wall (12) and the second side wall (14), and the output shaft of the motor (8) passes through the first side wall (12) and is connected to the drive gear; The drive gears drive the printing roller (7) and the paper feed roller (9) to rotate via the first reduction gear system and the second reduction gear system, respectively.

2. A printer cartridge as described in claim 1, characterized in that: The gears in the first and second reduction gear systems are double gears with a two-layer structure, and multiple double gears originate from the same plane.

3. A printer cartridge as described in claim 1, characterized in that: In the front-to-back direction, the output shaft of the motor (8) is located between the printing roller (7) and the paper feed roller (9).

4. A printer cartridge as described in claim 3, characterized in that: In the vertical direction, the printing roller (7) and the paper feed roller (9) are both located on the same side of the output shaft of the motor (8).

5. A printer cartridge as described in claim 1, characterized in that: It also includes a sensor (10), the frame is provided with a paper feed gap (60), and the frame is provided with a plurality of detection holes (112) suitable for sensing by the sensor (10); the second side wall (14) is provided with a first wire pass hole (143) and a second wire pass hole (144), the first wire pass hole (143) and the second wire pass hole (144) are respectively located on the upper and lower sides of the paper feed gap (60), and are suitable for the flexible circuit strip (20) connected to the sensor (10) to pass through the first wire pass hole (143) and the second wire pass hole (144) to the detection hole (112) in sequence.

6. A printer cartridge as described in claim 5, characterized in that: It also includes a heating head (4) and a first biasing element (5). The first sidewall (12) and the second sidewall (14) are provided with a first support portion for supporting the printing roller (7), and the frame is also provided with a second support portion for supporting the paper feed roller (9). The frame also includes a support plate (11) and a connecting block (15). The upper surface of the support plate (11) is used to support the printing medium. The two ends of the support plate (11) and the connecting block (15) are connected to the first sidewall (12) and the second sidewall (14). The first sidewall (12) and the second sidewall (14) are located in the... The support plate (11) is further provided with a third support portion in front of it to support the swing end of the hot head (4), and the first support portion is located below the third support portion; the connecting block (15) is located above the third support portion to allow the hot head (4) to be pressed against the first biasing member (5) of the printing roller (7); the support plate (11) is provided with a first opening (111) for the paper feed roller (9) to extend into; the frame is also provided with a second limiting portion (22), which opens forward to allow the support end (42) of the hot head (4) to be inserted.

7. A printer cartridge as described in claim 6, characterized in that: The frame also includes a protruding plate (13) that protrudes from the support plate (11); the first support portion includes a first shaft hole (123) on the first side wall (12) and a second shaft hole (142) on the second side wall (14); the second support portion includes a third shaft hole (124) on the first side wall (12) and a fourth shaft hole (131) on the protruding plate (13).

8. A printer cartridge as described in claim 6, characterized in that: The frame is also provided with a connecting cavity (23), and the rearward opening of the second limiting part (22) communicates with the connecting cavity (23) so that the flexible circuit strip (20) connected to the hot head (4) enters the connecting cavity (23). The connecting cavity (23), the paper passage gap (60) and the detection hole (112) are arranged sequentially from top to bottom, and the first wire passage hole (143) communicates with the connecting cavity (23).

9. A printer cartridge as described in claim 8, characterized in that: The first sidewall (12) is connected to the motor (8) at a position on the side of the connecting cavity (23) facing the first sidewall (12).

10. A printer, characterized in that: The device includes a paper tray (30), a second biasing member (40), a pressing member (50), and a printer core as described in any one of claims 1-9. The paper tray (30) is fixed to the frame and located above the frame. The two ends of the second biasing member (40) act on the pressing member (50) and the frame respectively, so that the pressing member (50) abuts against the paper feed roller (9).

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