A printer core support structure, a printer core and a printer

Abstract

This utility model discloses a printer core support structure, a printer core, and a printer. The printer core support structure includes a frame and an upper frame, facilitating the installation of a motor and gears: a first side wall connects to the motor and has a gear cavity. The printing assembly is configured as follows: a first support portion and a third support portion are provided in front of the support plate on the first and second side walls. The first support portion supports the printing roller, and a connecting block is provided for a first biasing member to press the heating head against the printing roller, ensuring the heating head is tightly against the printing roller. The third support portion supports the swing end of the heating head. The upper frame has a second limiting portion for inserting the support end of the heating head. The paper feed gap is configured as follows: the upper frame has a first limiting portion that moves downwards towards the support plate, forming a paper feed gap with the support plate. The frame has a second support portion supporting the paper feed roller, and the support plate has a first opening for the paper feed roller to extend into. Integrating multiple functions into two parts facilitates assembly and reduces manufacturing costs.

Description

Technical Field

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

[0002] In the existing technology, small printers often require the assembly of multiple parts to achieve functions such as paper feed gap control, print head and rubber roller installation of printing components, and motor gear transmission. Each part requires corresponding mold processing, which leads to high manufacturing costs. 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 support structure, 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 support structure, comprising:

[0006] A frame includes an integrally connected support plate, a first side wall, a second side wall, and a connecting block; the upper surface of the support plate supports the printing media; the support plate and the connecting block connect the first and second side walls arranged in a left-right direction; the first side wall is connected to a motor and has a gear cavity opening outwards in a left-right direction to accommodate a transmission gear; the first and second side walls have a first support portion supporting the printing roller and a third support portion supporting the swing end of the hot head in front of the support plate, the first support portion being located below the third support portion; the connecting block is located above the third support portion for a first biasing member to press the hot head against the printing roller; the frame has a second support portion suitable for supporting the paper feed roller so that the rotation axis of the paper feed roller is located below the support plate, the support plate having a first opening for the paper feed roller to extend into; and

[0007] The upper frame is fixed to the frame and located above the frame. The upper frame is provided with a first limiting part and a second limiting part. The first limiting part moves downward close to the support plate and forms a paper passage gap with the support plate. The second limiting part opens forward to allow the support end of the heating head to be inserted.

[0008] Option 2, based on Option 1, further includes a connecting cavity with an upward-facing first outlet. The rearward opening of the second limiting part communicates with the connecting cavity, allowing the flexible circuit strip connected to the heat head to extend out from the first outlet.

[0009] Option 3, based on Option 2, has a guide arc surface on the wall surface opposite to the second limiting part of the connecting cavity, which is suitable for guiding the flexible circuit strip to the first outlet.

[0010] Option 4, based on Option 3, is that the wall surface of the connecting cavity opposite to the second limiting part is formed by a number of raised ribs spaced apart in the left-right direction.

[0011] Option 5, based on Option 2, has a plurality of detection holes on the support plate suitable for sensing by the sensor from bottom to top, and the connecting cavity, the paper passage gap and the detection holes are arranged sequentially from top to bottom; the second side wall has a first wire passage hole and a second wire passage hole, the first wire passage hole and the second wire passage hole are respectively located on the upper and lower sides of the support plate, the first wire passage hole communicates with the connecting cavity, so that the flexible circuit strip connected to the sensor passes through the connecting cavity, the first wire passage hole and the second wire passage hole in sequence to the detection hole.

[0012] Option 6, based on Option 2, is that the first sidewall power supply connection is located on the side of the connection cavity facing the first sidewall, and is located between the first sidewall and the second sidewall.

[0013] Option 7, based on Option 6, has an output hole in the first sidewall that communicates with the gear cavity. The output hole is adapted to allow the output end of the motor to extend out, and in the front-rear direction, the output hole is located between the second support and the first support.

[0014] Option 8, based on Option 1, also includes a side cover, which is fixed to the frame to enclose the gear cavity.

[0015] Option 9: A printer cartridge includes a heating head, a first biasing member, a transmission gear, a printing roller, a motor, a paper feed roller, a sensing element, and a printer cartridge support structure as described in any one of Options 1 to 8; the motor is connected to the first sidewall, and the transmission gear is adapted to be housed in the gear cavity; the printing roller is supported by the first support portion, the paper feed roller is supported by the second support portion, and the paper feed roller extends into the first opening; the swing end of the heating head is supported by the third support portion, the support end of the heating head is adapted to be inserted into the opening of the second limiting portion, the sensing element is installed on the lower side of the support plate, and the two ends of the first biasing member act on the heating head and the connecting block, respectively.

[0016] Option 10: A printer includes a paper tray, a second biasing member, a pressing member, and a printer core as described in Option 9. The paper tray is fixed to the frame and located above the upper 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.

[0017] 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:

[0018] 1. In Scheme 1 and its preferred embodiments, a printer core support structure includes a frame and an upper frame. The frame includes a support plate, a first side wall, a second side wall, and a connecting block that are integrally connected to each other. This reduces the number of parts, increases connection strength, and facilitates the installation of corresponding functions.

[0019] The motor and gears are configured such that the first sidewall is connected to the motor and has a gear cavity that opens outward in the left-right direction to accommodate the transmission gear.

[0020] The printing assembly is configured as follows: The first and second sidewalls are provided with a first support portion and a third support portion in front of the support plate. 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 the 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 supports the swing end of the heating head. The upper frame is provided with a second limiting portion, which 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.

[0021] The paper feed gap is set as follows: The upper surface of the support plate supports the printing media. The upper frame has a first limiting part that moves downwards towards the support plate and forms a paper feed gap with it. Since the upper frame is fixed to the frame and located above the frame, the paper feed gap size is stable, ensuring smooth paper feeding. The frame has a second support part that supports the paper feed roller so that the rotation axis of the paper feed roller is located below the support plate. 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. This drives the printing media above the first opening 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 media to pass through at a time, only one sheet of printing media will pass through the paper feed gap and enter the printing roller position at a time.

[0022] Integrating multiple functions into two parts facilitates assembly and reduces manufacturing costs.

[0023] 2. In Scheme 2 and its preferred embodiment, the upper frame is further provided with a connecting cavity, the connecting cavity has an upward first outlet, and the rearward opening of the second limiting part is connected to the connecting cavity, so that the flexible circuit strip connected to the hot head can extend out from the first outlet, thereby realizing the setting of the flexible circuit strip connected to the hot head.

[0024] 3. In Scheme 3 and its preferred embodiments, the flexible circuit strip is set up as follows: When the second limiting part is inserted into the support end of the hot head, the flexible circuit strip connected to the hot head is automatically guided by the guiding arc surface to approach the first outlet and extend out of the first outlet, so that when the opening of the second limiting part is perpendicular to the first outlet, there is no need to manually correct the posture of the flexible circuit strip, making installation more convenient.

[0025] 4. In Scheme 4 and its preferred embodiments, the wall surface opposite to the second limiting part of the connecting cavity is formed by a number of raised ribs arranged at intervals in the left and right direction, which reduces the contact area between the guiding arc surface and the flexible circuit strip, reduces the possibility of adhesion, and makes it easier to install the flexible circuit strip connected to the hot head.

[0026] 5. In Scheme 5 and its preferred embodiments, since a pressing member is usually provided below the support plate to hold the paper between the pressing member and the paper feed roller, the sensor is usually not installed on the side of the pressing member to avoid the position of the pressing member affecting the sensing of the sensor. Therefore, the sensor needs to sense from bottom to top. For ease of unified control, the flexible circuit strip connected to the heat head and the flexible circuit strip connected to the sensor are usually connected as one unit. However, since the paper feed gap and the detection hole are arranged sequentially from top to bottom, the flexible circuit strip connected to the heat head and the flexible circuit strip connected to the sensor will be located on the upper and lower sides of the support plate respectively, which presents a problem of difficult arrangement. This design incorporates a first and a second wire-passing 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-passing hole, and the second wire-passing hole to the detection hole, thus connecting to the sensor. Because the first and second wire-passing 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-passing holes, simplifying manufacturing. Furthermore, the thickness of the second sidewall does not need to be increased, resulting in a thinner printer core support structure in the left-right direction. This wiring method also avoids the paper feed gap, preventing interference with the paper within the gap.

[0027] 6. In Scheme Six and its preferred embodiments, the first sidewall power supply is connected between the first and second sidewalls. This reduces the problem of increased thickness of the printer cartridge support structure in the left-right direction when the motor protrudes from the second sidewall away from the first sidewall. Furthermore, the first sidewall power supply is connected to the side of the connecting cavity facing the first sidewall, facilitating the integration of the flexible circuit strip connected to the motor and the flexible circuit strip connected to the heating head. The flexible circuit strip connected to the motor can extend from the connecting cavity to connect with the motor, thus facilitating installation and control.

[0028] 7. In Scheme 7 and its preferred embodiments, since the output hole is located between the second support and the first support in the front-back direction, that is, the transmission gear is arranged from the output hole toward the second support and the first support to realize transmission. Compared with the output hole being on the same side of the second support and the first support, the transmission distance is shorter, which can reduce the thickness of the transmission gear, thereby reducing the thickness of the gear cavity, and thus reducing the thickness of the printer core support structure in the left-right direction.

[0029] 8. In Scheme 8 and its preferred embodiments, a side cover is also included, which is fixedly connected to the frame to seal the gear cavity, thereby protecting the transmission gear inside the gear cavity and preventing water and dust from damaging the transmission gear.

[0030] 9. A printer cartridge, comprising a heating head, a first biasing member, a transmission gear, a printing roller, a motor, a paper feed roller, a sensing element, and the aforementioned printer cartridge support structure; the motor is connected to a first sidewall, and the transmission gear is adapted to be housed in a gear cavity; the printing roller is supported by a first support portion, and the paper feed roller is supported by a second support portion, the paper feed roller extending into a first opening; the swing end of the heating head is supported by a third support portion, the support end of the heating head is adapted to be inserted into the opening of a second limiting portion, the sensing element is mounted on the lower side of a support plate, and the two ends of the first biasing member act on the heating head and a connecting block, respectively. This printer cartridge support structure provides the beneficial effects described above.

[0031] 10. A printer comprising a paper tray, a second biasing member, a pressing member, and a printer core as described above, wherein the paper tray is fixedly connected to a frame and located above an upper 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 possesses the beneficial effects brought about by the aforementioned printer core. Attached Figure Description

[0032] 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.

[0033] Figure 1 This is a perspective view of the printer portion of the structure in Example 1;

[0034] Figure 2 This is a structural diagram of the printer portion of the device in Example 1;

[0035] Figure 3 This is a perspective view of the front side of the printer cartridge in Example 1;

[0036] Figure 4 This is a perspective view of the upper side of the printer cartridge in Example 1;

[0037] Figure 5 This is a perspective view of the side end of the printer cartridge in Example 1;

[0038] Figure 6 This is a perspective view of the rack in Example 1;

[0039] Figure 7 This is a perspective view of the underside of the frame in Embodiment 1;

[0040] Figure 8 This is a side view of the rack in Example 1;

[0041] Figure 9 This is a top view of the rack in Example 1;

[0042] Figure 10 This is a three-dimensional view of the shelf in Example 1;

[0043] Figure 11 This is a three-dimensional view of the shelf above in Example 1;

[0044] Figure 12 This is a perspective view of the side cover in Embodiment 1;

[0045] Figure 13 This is a top view of the transmission gear in Example 1;

[0046] Figure 14 This is a perspective view of the heat head in Example 1;

[0047] Figure 15 This is a schematic diagram of the printer structure in Example 1.

[0048] Explanation of key figure labels:

[0049] 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;

[0050] Second sidewall 14; second limiting hole 141; second shaft hole 142; first wire through hole 143; second wire through hole 144;

[0051] Connecting block 15; elastic mounting part 16; elastic locking protrusion 161;

[0052] 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.

[0053] Motor cavity 24;

[0054] Side cover 3; heating head 4; swing part 41; support end 42; first biasing component 5; transmission gear 6; printing roller 7; motor 8; paper feed roller 9; sensing component 10; flexible circuit belt 20; paper tray component 30; second biasing component 40; pressing component 50; paper feed gap 60; Detailed Implementation

[0055] 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.

[0056] 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.

[0057] 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 this utility model and simplifying the description. It does not 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 protection scope of this utility model.

[0058] 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.

[0059] 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."

[0060] 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.

[0061] The printer core includes a printer core support structure, 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, and a flexible circuit strip 20.

[0062] The printer core support structure includes a frame 1, an upper frame 2, and a side cover 3.

[0063] refer to Figures 6-9The 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.

[0064] 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.

[0065] refer to Figure 9 The support plate 11 is also provided with a plurality of detection holes 112 suitable for sensing by the sensor 10 from bottom to top. In this embodiment, there are two detection holes 112, arranged in the front-back direction, and both are located on the side of the first opening 111 near the second sidewall 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 portion 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 portions 16 is the same as the number of detection holes 112 and is arranged corresponding to the detection holes 112. The elastic mounting portion 16 is provided with an elastic protrusion 161.

[0066] 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.

[0067] The first sidewall 12 and the second sidewall 14 are arranged at intervals in the left-right direction.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] refer to Figure 8The second sidewall 14 is provided with a first wire hole 143 and a second wire hole 144, which are located on the upper and lower sides of the support plate 11, respectively.

[0074] refer to Figure 10 , Figure 11 , Figure 15 The 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 support end 42 of the heating head 4 to be inserted, and the rearward opening is for the flexible circuit strip 20 connected to the heating head 4 to extend into the connecting cavity 23. To limit the swing range of the support end 42 of the hot head 4, the second limiting part 22 is also provided with two limiting protrusions 221 arranged vertically and oppositely along the sides; limiting the support end 42 of the hot head 4 between the two limiting protrusions 221, so that the support end 42 can be held in the middle, and 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 contact with the printing roller 7, ensure that the pressure of the hot head 4 is consistent, and ensure good printing uniformity.

[0075] 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.

[0076] 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.

[0077] refer to Figure 12The side cover 3 is fixedly connected to the frame 1 to enclose the gear cavity 121. The fixing method can be screw connection, snap-fit, etc. The side cover 3 is provided with shaft holes for supporting the gear shaft to avoid the reduction in life caused by the gear cantilever beam structure.

[0078] like Figure 4 The motor 8 is connected to the first side wall 12, and the output end of the motor 8 is adapted to extend out of the output hole 125 to connect with the transmission gear 6 of the gear cavity 121.

[0079] refer to Figure 13 The transmission gear 6 is housed in the gear cavity 121 and spreads outward and backward from the output hole 125. Due to this arrangement, the transmission gear 6, under the condition of satisfying the deceleration transmission, is basically equal to the thickness H of the input tooth plus the output tooth of the transmission gear 6 (two-layer structure). The first support and the second support are located on the same side of the output hole 125. The transmission gear 6 has multiple double gears for deceleration. 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 transmission requirements are met, a three-layer structure is typically used. Therefore, the structure of this embodiment can be made thinner. For example, in Chinese patent CN211518982U, since the motor is located at one end outside the base frame, and due to transmission needs, the driving gear and driven gear of the motor mesh, and 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, forming a gear set structure with a three-layer thickness. As another example, in CN107639942B, since the motor is located at one end outside the base frame, and due to transmission needs, 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 14The 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 5 The 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 and located above the upper frame 2. 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 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 above-mentioned printer core support structure, the motor 8 and transmission gear 6, the printing components, the paper feed gap 60, the flexible circuit strip 20, and the sensing element 10 can be set up using only the frame 1 and the upper frame 2, making the structure simple.

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

[0092] In one exemplary embodiment, a printer core support structure 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] Integrating multiple functions into two parts facilitates assembly and reduces manufacturing costs.

[0097] In one exemplary embodiment, the upper shelf 2 is further provided with a connecting cavity 23, the connecting cavity 23 having an upward first outlet 231, the rearward opening of the second limiting part 22 communicating with the connecting cavity 23, so that the flexible circuit strip 20 connected to the heat head 4 extends out from the first outlet 231, thereby realizing the setting of the flexible circuit strip 20 connected to the heat head 4.

[0098] In one exemplary embodiment, the flexible circuit strip 20 is configured such that when the second limiting part 22 is inserted into the support end 42 of the hot head 4, 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.

[0099] 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.

[0100] In one exemplary embodiment, 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, the sensor 10 is usually not installed on the side of the pressing member 50 to avoid the position of the pressing member 50 affecting the sensing of the sensor 10. 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 sensor 10 are usually connected as one unit. However, since the paper feed 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 sensor 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 core support structure in the left-right direction. Furthermore, this wiring method avoids the paper feed gap 60, preventing any impact on the paper within the gap.

[0101] In one exemplary embodiment, the motor 8 is connected to the first sidewall 12 between the first sidewall 12 and the second sidewall 14. This reduces the problem of increased thickness of the printer cartridge support structure in the left-right direction when the motor 8 protrudes from the second sidewall 14 away from the first sidewall 12. Furthermore, the motor 8 is connected to the first sidewall 12 on the side of the connecting cavity 23 facing the first sidewall 12, facilitating the integration of the flexible circuit strip 20 connected to the motor 8 and the flexible circuit strip 20 connected to the heating head 4. The flexible circuit strip 20 connected to the motor 8 can extend from the connecting cavity 23 and connect to the motor 8, thus facilitating installation and control.

[0102] In one exemplary embodiment, since the output hole 125 is located between the second support and the first support in the front-back direction, that is, the transmission gear 6 is arranged close to the second support and the first support from the output hole 125 to realize transmission. Compared with the output hole 125 being on the same side of the second support and the first support, the transmission distance is shorter, which can reduce the thickness of the transmission gear 6, thereby reducing the thickness of the gear cavity 121, and thus reducing the thickness of the printer core support structure in the left-right direction.

[0103] In one exemplary embodiment, a side cover 3 is further included, which is fixedly connected to the frame 1 to enclose the gear cavity 121, thereby protecting the transmission gear 6 inside the gear cavity 121 from damage by water and dust. 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 onto). This shaft hole can prevent the gear shaft from maintaining a cantilever beam stress state, thus improving the service life of the gear shaft.

[0104] In one exemplary embodiment, a printer cartridge includes a heating head 4, a first biasing member 5, a transmission gear 6, a printing roller 7, a motor 8, a paper feed roller 9, a sensor 10, and the aforementioned printer cartridge support structure. The motor 8 is connected to a first sidewall 12, and the transmission gear 6 is adapted to be housed in a gear cavity 121. The printing roller 7 is supported by a first support portion, and the paper feed roller 9 is supported by a second support portion, extending into a first opening 111. The swing end of the heating head 4 is supported by a third support portion, and the support end 42 of the heating head 4 is adapted to be inserted into the opening of a second limiting portion 22. The sensor 10 is mounted on the lower side of a support plate 11, and the two ends of the first biasing member 5 act on the heating head 4 and the connecting block 15, respectively. This printer cartridge support structure provides the beneficial effects described above.

[0105] 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 the frame 1 and located above the upper frame 2. The two ends of the second biasing member 40 act on the pressing member 50 and the frame 1 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.

[0106] 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 support structure, characterized in that, include: 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; the upper surface of the support plate (11) is used to support the printing medium; the support plate (11) and the connecting block (15) connect the first side wall (12) and the second side wall (14) which are arranged in the left-right direction; the first side wall (12) is connected to the motor (8) and has a gear cavity (121) that opens outward in the left-right direction to accommodate the transmission gear (6); the first side wall (12) and the second side wall (14) are connected in the support plate (11) to the motor (8) and have a gear cavity (121) that opens outward in the left-right direction to accommodate the transmission gear (6); the first side wall (12) and the second side wall (14) are connected in the support plate (11) to the motor (12 ... to the motor (14) to the motor (15) to the motor (15) to the motor (16) to the motor (17) to the motor (18) to the motor (19) to the motor (19) to the motor (10) to the motor (19) to the motor (10) to the motor (11) to the motor (19) to the motor (10) to the motor (11) to the motor (12) to the motor (19) to the motor (10) to the motor (11) to the motor (10) to the motor (11) to the motor (12) to the motor (19) to the motor (10) to the motor (11) to the motor (10) to the motor (11) to the motor (10) to the motor (11 The plate (11) is provided with a first support for supporting the printing roller (7) and a third support for supporting the swing end of the hot head (4), the first support being located below the third support; the connecting block (15) is located above the third support for pressing the hot head (4) against the printing roller (7) by a first biasing member (5); the frame (1) is provided with a second support 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), the support plate (11) being provided with a first opening (111) for the paper feed roller (9) to extend into; and The upper frame (2) is fixed to the frame (1) and located above the frame (1). The upper frame (2) is provided with a first limiting part (21) and a second limiting part (22). The first limiting part (21) moves downward close to the support plate (11) and forms a paper passage gap (60) with the support plate (11). The second limiting part (22) opens forward to allow the support end (42) of the heating head (4) to be inserted.

2. The printer core support structure as described in claim 1, characterized in that: The upper shelf (2) is also provided with a connecting cavity (23), the connecting cavity (23) is provided with an upward first outlet (231), 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 heat head (4) extends out from the first outlet (231).

3. The printer core support structure as described in claim 2, characterized in that: The wall surface of the connecting cavity (23) opposite to the second limiting part (22) is provided with a guiding arc surface (232) suitable for guiding the flexible circuit strip (20) to the first outlet (231).

4. A printer core support structure as described in claim 3, characterized in that: 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.

5. A printer core support structure as described in claim 2, characterized in that: The support plate (11) is provided with a plurality of detection holes (112) suitable for sensing by the sensing element (10) from bottom to top. The connecting cavity (23), the paper passage gap (60) and the detection holes (112) are arranged sequentially from top to bottom. The second side wall (14) is provided with a first wire passage hole (143) and a second wire passage hole (144). The first wire passage hole (143) and the second wire passage hole (144) are located on the upper and lower sides of the support plate (11), respectively. The first wire passage hole (143) communicates with the connecting cavity (23) 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) to the detection hole (112) in sequence.

6. A printer core support structure as described in claim 2, 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), and between the first sidewall (12) and the second sidewall (14).

7. A printer core support structure as described in claim 6, characterized in that: The first sidewall (12) is provided with an output hole (125) communicating with the gear cavity (121). The output hole (125) is adapted to allow the output end of the motor (8) to extend out, and in the front-rear direction, the output hole (125) is located between the second support and the first support.

8. A printer core support structure as described in claim 1, characterized in that: It also includes a side cover (3), which is fixed to the frame (1) to close the gear cavity (121).

9. A printer cartridge, characterized in that: The device includes a heat head (4), a first biasing member (5), a transmission gear (6), a printing roller (7), a motor (8), a paper feed roller (9), a sensor (10), and a printer core support structure as described in any one of claims 1-8; the motor (8) is connected to the first sidewall (12), and the transmission gear (6) is adapted to be housed in the gear cavity (121); the printing roller (7) is supported by the first support portion, the paper feed roller (9) is supported by the second support portion, and the paper feed roller (9) extends into the first opening (111); the swing end of the heat head (4) is supported by the third support portion, the support end (42) of the heat head (4) is adapted to be inserted into the opening of the second limiting portion (22), the sensor (10) is installed on the lower side of the support plate (11), and the two ends of the first biasing member (5) act on the heat head (4) and the connecting block (15) respectively.

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 claim 9. The paper tray (30) is fixedly connected to the frame (1). The two ends of the second biasing member (40) act on the pressing member (50) and the frame (1) respectively, so that the pressing member (50) abuts against the paper feed roller (9).

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