Printing trolley

Abstract

The utility model is suitable for the field of digital printing, and provides a printing dolly, which comprises a base, a plurality of nozzles are fixedly arranged at the inner bottom, a control valve assembly is arranged at the position, close to the front side, of the inner top, the control valve assembly comprises a plurality of control valves, and the input end and the output end of each nozzle are respectively connected with one control valve; the middle plate is arranged at the outer top of the base, is sequentially provided with a first mounting position, a second mounting position and a third mounting position, and is provided with a wire slot; the ink box assembly comprises a plurality of ink boxes, and the ink boxes are arranged at the first mounting position in an array mode; the control panel assembly is arranged on the second mounting position and is used for controlling the spray head to perform ink jet printing; the degassing module assembly comprises a plurality of degassing modules, and the degassing modules are arranged at the third mounting position in an array manner; the bottom of the top cover is provided with an opening, the opening covers the middle plate and abuts against the base, and the bottom of the top cover is connected with the middle plate. The structural layout is neat, and the modular structure is convenient to disassemble, assemble, maintain, upgrade and update.

Description

TECHNICAL FIELD

[0001] The utility model belongs to digital printing field, especially relate to a printing trolley. BACKGROUND

[0002] The printing trolley of the existing digital printing equipment mainly includes three parts of a nozzle assembly, an ink supply system and a control board card, the nozzle assembly is arranged on the base, the control board card is arranged above the base and is covered by a protective cover, the ink supply system includes a degassing module, an ink cartridge and various control valve elements, in the existing structure, the degassing module and the control valve are usually arranged in the base together with the nozzle, the ink cartridge is arranged outside the base, when connecting the ink path, the ink pipe needs to be connected to the base first and connected with the degassing module, then it is connected with the ink cartridge by penetrating out of the base, finally it is connected with the control valve, the nozzle and the like by connecting from outside the base into the base, the ink path is arranged in a winding manner and is in a mess, and the control valve is usually directly fixed on the corresponding ink path pipeline and suspended in the base, resulting in that the space in the base is extremely crowded, which is very inconvenient for maintenance personnel to overhaul and maintain the structure in the base, in addition, the protective cover is usually opened at the top, and the board card and the like are checked and viewed from the top, the periphery of the protective cover makes it difficult to overhaul and maintain the board card and the like, and the components and pipelines of the whole trolley assembly are distributed in a mess, which causes difficulties for the maintenance and overhaul of the operator and the upgrading. CONTENT OF THE UTILITY MODEL

[0003] The utility model provides a printing trolley, and aims to solve the problems of messy structure layout, messy pipeline and component occupation of a large amount of space in the prior art, which causes difficulties for the operator to overhaul and maintain the components and upgrade.

[0004] The utility model is realized in this way, a printing trolley, comprising:

[0005] The base is internally hollow, a plurality of nozzles are fixedly arranged on the inner bottom, a control valve assembly is arranged on the inner top close to the front side, the control valve assembly comprises a plurality of control valves, and the input end and the output end of each nozzle are connected with one control valve respectively;

[0006] The intermediate plate is arranged on the outer top of the base, the intermediate plate is sequentially provided with a first mounting position, a second mounting position and a third mounting position from the front side to the rear side, the first mounting position is located above the control valve assembly, and the intermediate plate is provided with wire grooves on the opposite sides of the line connecting the first mounting position and the second mounting position at the second mounting position;

[0007] The ink cartridge assembly comprises a plurality of ink cartridges, the plurality of ink cartridges are arranged in an array on the first mounting position, and the plurality of ink cartridges are communicated with the plurality of nozzles;

[0008] A control panel assembly, in an array cabinet structure, is disposed on the second mounting position, and is used to control the inkjet printing of the nozzle;

[0009] A degassing module assembly, comprising a plurality of degassing modules, wherein the plurality of degassing modules are arranged in an array at the third installation position, and the plurality of degassing modules are connected to the input ends of the plurality of ink cartridges by using pipelines passing through the wire groove;

[0010] The top cover has an opening at the bottom. The opening is arranged outside the middle plate and abuts against the base. The bottom of the top cover is connected to the middle plate.

[0011] Furthermore, fixing frames are provided on opposite side walls of the base, mounting rods are connected between the fixing frames on opposite sides, several control valves are fixed on the mounting rods, and several control valves are arranged at intervals along the length direction of the mounting rods.

[0012] Furthermore, a fixing bar is provided in the middle of the fixing frame at an angle to the horizontal plane, and both ends of the mounting rod are respectively connected to the fixing bar. There are at least two mounting rods, and at least two mounting rods are arranged at intervals along the fixing bar. Several control valves are distributed on at least two mounting rods.

[0013] Furthermore, the first installation position is a groove, and a plurality of ink cartridge arrays are arranged in the groove, and the connectors of the ink cartridges pass through the bottom of the groove and are connected to the control valve.

[0014] Furthermore, the top wall of the base is shared with the middle plate, and the middle plate is provided with a through groove at the first mounting position, and a sealing plate is provided in the through groove. The sealing plate includes a bottom plate sunk into the through groove and side walls extending upward from opposite sides of the bottom plate and abutting against the through groove. The sealing plate and the through groove form the groove, and a number of the ink cartridges are fixed on the bottom plate of the sealing plate.

[0015] Furthermore, the ink cartridge adopts a connecting piece which passes through the bottom plate from below the bottom plate and is detachably connected to the ink cartridge.

[0016] Furthermore, the intermediate plate is provided with a mounting frame on the third mounting position, and the mounting frame includes a cross bar, and the cross bar is provided with a plurality of clamping members configured one by one with the plurality of degassing modules at intervals along its length direction, and the degassing modules are detachably clamped on the clamping members.

[0017] Furthermore, the holding member includes two spring pieces with an arc-shaped structure, and the two spring pieces are arranged opposite to each other to form an opening for the degassing module to enter and exit, and a space for accommodating the degassing module.

[0018] Furthermore, a first window is provided at a position on the front side of the top cover corresponding to the ink cartridge assembly, and the first window is provided with a first panel, and the first panel is made of a transparent material;

[0019] A second window is provided on the front side of the base. The second window is provided with a second panel. The second panel is made of transparent material.

[0020] Furthermore, a connecting hole is provided on the side of the middle plate, and a strip through groove is provided on the side wall of the top cover opposite to the connecting hole, and the strip through groove extends toward the side of the base to the edge of the side wall of the top cover, and the connecting piece is sequentially passed through the strip through groove and the connecting hole to connect and fix the top cover to the middle plate.

[0021] The beneficial effects achieved by the present invention have at least the following advantages compared to the prior art:

[0022] (1) The connection method between the middle plate and the bottom of the top cover makes the middle plate assembly in an open arrangement when the top cover is removed, which is very friendly to the maintenance and replacement of the control board assembly, ink cartridge assembly, degassing module assembly and other electronic components, providing favorable conditions for future upgrades;

[0023] (2) The ink cartridge assembly, the control board assembly and the degassing module assembly are respectively arranged in a modular manner at the first mounting position, the second mounting position and the third mounting position on the middle plate. Wire grooves for the passage of pipes between the ink cartridge assembly and the degassing module assembly are arranged on opposite sides of the second mounting position. The components of the entire trolley are clearly layered. The control valve assembly is arranged on the base and corresponds to the ink cartridge assembly. When the entire ink system is installed, the external pipeline is first connected to the degassing module, then to the ink cartridge through the wire groove, and then to the control valve assembly of the base from the bottom of the ink cartridge. Finally, the nozzle is connected through the control valve assembly. This arrangement reduces the difficulty of wiring and piping. The entire layout is clear and concise, and the pipelines do not have too many bends.

[0024] (3) All components on the entire vehicle are arranged in an array, forming a central and left-right symmetrical layout in the structure, and the functions of all components are clear at a glance;

[0025] (4) By placing the ink cartridge assembly and the degassing module assembly outside the base and installing the control valve assembly on the top of the base, the internal space of the base is ample, which is very friendly to maintenance personnel when maintaining the printhead. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the external structure of a printing carriage provided by the utility model;

[0027] Figure 2It is the internal structure schematic view of the printing trolley provided by the utility model;

[0028] Figure 3 It is the explosion view of the printing trolley provided by the utility model;

[0029] Figure 4 It is the intermediate plate of the printing trolley and the assembly structure schematic view of the components arranged on the intermediate plate provided by the utility model;

[0030] Figure 5 It is Figure 1 The enlarged view of the middle A.

[0031] Explanation of reference numerals:

[0032] 1, base; 11, fixed frame; 111, fixed strip; 12, mounting rod; 13, second panel; 2, spray head; 3, control valve assembly; 31, control valve; 4, intermediate plate; 41, wire slot; 42, through slot; 43, connecting hole; 5, ink box assembly; 51, ink box; 6, control board assembly; 7, degassing module assembly; 71, degassing module; 8, top cover; 81, first panel; 82, strip-shaped through slot; 9, sealing plate; 91, bottom plate; 911, through hole; 92, side plate; 10, mounting frame; 101, cross rod; 102, holding piece; 1021, elastic sheet. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below by combining with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0034] See Figure 1-Figure 2The embodiment of the present invention provides a printing carriage, including a base 1, an intermediate plate 4, an ink cartridge assembly 5, a control board assembly 6, a degassing module assembly 7 and a top cover 8. The interior of the base 1 is a hollow structure, and a plurality of nozzles 2 are fixedly provided at the inner bottom. The nozzles 2 are used to receive ink and spray ink on the printing medium to achieve printing operations. A control valve assembly 3 is provided at the inner top near the front side, so that personnel can disassemble and maintain the control valve assembly 3 from the front side of the base 1. The control valve assembly 3 includes a plurality of control valves 31. The input and output ends of each nozzle 2 are connected to a control valve 31. The control valve 31 can cut off the ink path of the input and / or output ends of the nozzle 2 to achieve the purpose of controlling the nozzle 2. The intermediate plate 4 is provided at the outer top of the base 1. The middle plate 4 is provided with a first mounting position, a second mounting position and a third mounting position in sequence from the front to the back. The first mounting position is located above the control valve assembly 3. The middle plate 4 is provided with a wire groove 41 on opposite sides of the connection line between the first mounting position and the second mounting position at the second mounting position. That is, the wire groove 41 is used for routing the pipeline between the following ink cartridge assembly 5 on the first mounting position and the following degassing module assembly 7 on the third mounting position. The ink cartridge assembly 5 includes a plurality of ink cartridges 51. The plurality of ink cartridges 51 are arranged in an array at the first mounting position. The plurality of ink cartridges 51 are connected to the plurality of nozzles 2, specifically the input end and the output end of the nozzle 2. Each is connected to an ink cartridge 51 to form a circulation loop, the control board assembly 6 is in an array cabinet structure and is arranged on the second mounting position, the control board assembly 6 is used to control the inkjet printing of the nozzle 2, the degassing module assembly 7 includes a plurality of degassing modules 71, and the plurality of degassing modules 71 are arranged in an array at the third mounting position, and the plurality of degassing modules 71 are connected to the input end of the plurality of ink cartridges 51 to exhaust air from the ink input into the ink cartridge 51. The middle plate 4 is respectively provided with a first mounting position for mounting the ink cartridge assembly 5, a second mounting position for mounting the control board assembly 6, and a third mounting position for mounting the degassing module assembly 7. The three mounting positions allow the various components on the middle plate 4 of the component to be installed in a modular manner, with a neat and beautiful structure. The individual original array arrangement of each component facilitates the disassembly and maintenance of individual units within each component. An opening is provided at the bottom of the top cover 8, and the opening is provided outside the middle plate 4 and abuts against the base 1, so that the base 1 supports the top cover 8. The bottom of the top cover 8 is connected to the middle plate 4 so that the top cover 8 is connected and fixed to the middle plate 4. After the top cover 8 is disassembled from the middle plate 4, the entire top cover 8 can be moved out of the middle plate 4 as a whole, so as to facilitate the disassembly and maintenance of the various components on the middle plate 4.

[0035] Compared with the prior art, the printing carriage provided by the present invention has at least the following advantages:

[0036] (1) The connection method between the middle plate 4 and the bottom of the top cover 8 makes the components arranged on the middle plate 4 in an open arrangement when the top cover 8 is removed, which is very friendly to the maintenance and replacement of the control board assembly 6, the ink cartridge assembly 5, the degassing module assembly 7 and other electronic components, providing favorable conditions for future upgrades;

[0037] (2) The ink cartridge assembly 5, the control board assembly 6 and the degassing module assembly 7 are respectively arranged in a modular manner at the first mounting position, the second mounting position and the third mounting position on the middle plate 4. The opposite sides of the second mounting position are provided with a wire groove 41 for the pipe to pass between the ink cartridge assembly 5 and the degassing module assembly 7. The components of the entire trolley are clearly layered; and the control valve assembly 3 is arranged on the base 1 and corresponds to the ink cartridge assembly 5, so that when the entire ink system is installed, the external pipeline is first connected to the degassing module 71, then connected to the ink cartridge 51 through the wire groove 41, and then connected to the control valve assembly 3 of the base 1 from the bottom of the ink cartridge 51, and finally connected to the nozzle 2 through the control valve assembly 3. This arrangement reduces the difficulty of wiring and piping, and the entire layout is clear and concise, without too many bends in the pipeline;

[0038] (3) All components on the entire vehicle are arranged in an array, forming a central and left-right symmetrical layout in the structure, and the functions of all components are clear at a glance;

[0039] (4) By arranging the ink cartridge assembly 5 and the degassing module assembly 7 outside the base 1 and installing the control valve 31 assembly on the top of the base 1, the internal space of the base 1 is ample, which is very friendly to maintenance personnel when maintaining the nozzle 2.

[0040] It should be noted that the control valve 31 is connected to the nozzle 2 by a pipeline. The front side and the rear side refer to the side facing the staff when the printing carriage is working as the front side, and the side facing away as the rear side. The array cabinet structure of the control panel assembly 6 refers to the multiple control panels on the control panel assembly 6 forming an integral structure in a stacked manner. The control panel assembly 6 can be 1 group, 2 groups, 3 groups..., and when there are multiple groups, the control panel assembly 6 is arranged in an array and installed on the second mounting position.

[0041] See also Figure 2-Figure 3Further, the opposite two side walls of the base 1 are provided with fixing frames 11, and the fixing frames 11 on the opposite two sides are connected with mounting rods 12, and the control valves 31 are fixed on the mounting rods 12, and the control valves 31 are arranged at intervals along the length direction of the mounting rods 12. The fixing frames 11 can enhance the strength of the side walls of the base 1 and avoid the influence of the weight of the control valves 31 on the structural stability of the base 1, and the mounting rods 12 facilitate the expandable arrangement and fixation of the control valves 31. The structure can install the control valve assembly 3 on the base 1 in a modular structure, can make the space structure inside the base 1 more abundant, and avoid the installation mode of the control valves 31 attached to the pipeline to cause the space inside the base 1 to be messy and occupy the entire space of the base 1.

[0042] Further, the middle part of the fixing frame 11 is provided with a fixing strip 111 arranged at an angle with the horizontal plane, and the two ends of the mounting rod 12 are connected to the fixing strip 111, and the mounting rod 12 is at least two, so as to provide sufficient installation space for the control valves 31, and the at least two mounting rods 12 are arranged at intervals along the fixing strip 111, and the control valves 31 are distributed on the at least two mounting rods 12. The inclined fixing strip 111 is arranged, and the mounting rod 12 is fixed on the fixing strip 111, and when the mounting rod 12 is multiple, the control valves 31 can be staggered in the vertical direction to facilitate disassembly and maintenance.

[0043] Referring to Figure 4 Further, the first mounting position is a groove, and the ink cartridges 51 are arranged in the groove, and the connectors (not shown in the figure) of the ink cartridges 51 pass through the bottom of the groove and are connected with the control valves 31. By arranging the first mounting position as a sinking structure, the distance between the connectors of the ink cartridges 51 and the control valves 31 can be shortened, and the ink pipe connection between the connectors of the ink cartridges 51 and the control valves 31 is facilitated. It should be noted that the connectors connect the ink outlet and the ink inlet of the ink cartridges 51, and are used for the ink to flow out of the ink cartridges 51 or the ink to flow into the ink cartridges 51.

[0044] Referring to Figure 4 Specifically, the bottom of the groove is provided with a through hole 911 for the connector to pass through.

[0045] Referring to Figure 4Furthermore, the top wall of the base 1 is shared with the middle plate 4, that is, the middle plate 4 is the top wall of the base 1, so as to avoid the need for the connector of the ink cartridge 51 to pass through two layers of structure before it can be connected to the control valve 31, thereby facilitating the connection of the pipeline between the ink cartridge 51 and the control valve 31. A through groove 42 is provided on the middle plate 4 at the first installation position, and a sealing plate 9 is provided in the through groove 42. The sealing plate 9 includes a bottom plate 91 sunk into the through groove 42 and side walls extending upward from opposite sides of the bottom plate 91 and abutting against the through groove 42. The sealing plate 9 and the through groove 42 form a groove, and a through hole 911 is provided on the bottom plate 91. Several ink cartridges 51 are fixed to the bottom plate 91 of the sealing plate 9. In this way, the groove is formed by the cooperation between the sealing plate 9 and the through groove 42, which facilitates the processing of the first installation position of the middle plate 4 and can reduce the thickness of the sealing plate 9 at the same time. That is, the sealing plate 9 does not need to be set to the same thickness as the middle plate 4, thereby reducing material costs.

[0046] Furthermore, the ink cartridge 51 is detachably connected to the bottom plate 91 by a connector (not shown). Specifically, the connector can be a screw that locks the ink cartridge 51 from the bottom of the bottom plate 91 to facilitate installation of the ink cartridge 51 on the middle plate 4, eliminating the need for a separate mounting structure for the ink cartridge 51 and the middle plate 4.

[0047] See also Figure 4 Furthermore, the middle plate 4 is provided with a mounting bracket 10 at the third mounting position, and the mounting bracket 10 includes a cross bar 101. The cross bar 101 is provided with a plurality of clamping members 102 arranged one by one with a plurality of degassing modules 71 at intervals along its length direction, and the degassing modules 71 are detachably clamped on the clamping members 102. The degassing modules 71 are detachably connected to the clamping members 102, which facilitates the disassembly, maintenance and upgrading of the degassing modules 71. It should be noted that the number of cross bars can be set according to the number of degassing modules 71. When the number of degassing modules 71 increases, if one cross bar 101 cannot completely accommodate all the degassing modules 71, the number of cross bars 101 can be increased, and there is no restriction on this.

[0048] See also Figure 4 Furthermore, the holding member 102 includes two arc-shaped spring pieces 1021. The two spring pieces 1021 are arranged relative to each other to form an opening for the degassing module 71 to enter and exit, as well as a space for accommodating the degassing module 71. This allows the degassing module 71 to enter and exit the space through the opening when being installed or removed. The elastic force of the spring pieces 1021 can cause the opening to expand or retract. Once the degassing module 71 enters the space, the two spring pieces 1021 can hold the degassing module 71 tightly, making installation and removal simple.

[0049] See also Figure 1 、 Figure 3Furthermore, a first window (not shown) is provided on the front side of the top cover 8 at a position corresponding to the ink cartridge assembly 5. The first window is provided with a first panel 81, which is made of a transparent material. A second window (not shown) is provided on the front side of the base 1. The second window is provided with a second panel 13, which is made of a transparent material. The provision of the first panel 81 and the second panel 13 facilitates the operator to observe abnormal conditions of the ink cartridge 51 and the ink path in real time during operation of the device, including but not limited to the generation of bubbles, so that the operator can promptly address the abnormal conditions. Specifically, the transparent material can be, but is not limited to, acrylic.

[0050] See also Figure 1 、 Figure 5 Specifically, a connecting hole 43 is provided on the side of the middle plate 4, and a strip-shaped through-slot 82 is provided on the side wall of the top cover 8 at a position opposite the connecting hole 43. The strip-shaped through-slot 82 extends toward one side of the base 1 to the edge of the side wall of the top cover 8. A connecting member is sequentially provided through the strip-shaped through-slot 82 and the connecting hole 43 to connect and secure the top cover 8 to the middle plate 4. When the connecting member is pressed against the side wall of the top cover 8, the pressing force can press the top cover 8 and the middle plate 4 together. The strip-shaped through-slot 82 of the top cover 8 extends to the edge of the side wall of the top cover 8, forming an opening structure. When disassembling the top cover 8, there is no need to completely remove the connecting member. It is only necessary to loosen a certain gap between the side wall of the top cover 8 and the middle plate 4. The top cover 8 can then be directly pulled out from above the middle plate 4. The connecting member can be removed from the opening of the strip-shaped through-slot 82, making the disassembly and assembly of the top cover 8 extremely simple.

[0051] The connecting member may be a screw, the connecting hole 43 is a threaded hole, the screw passes through the strip-shaped through slot 82 and is screwed into the threaded hole, and the head of the screw abuts against the side wall of the top cover 8 .

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A printing carriage, characterized in that: include: The base has a hollow structure inside, with a plurality of nozzles fixed on the inner bottom and a control valve assembly provided at the inner top near the front side. The control valve assembly includes a plurality of control valves, and the input end and output end of each nozzle are respectively connected to one of the control valves; an intermediate plate, disposed on the outer top of the base, the intermediate plate being provided with a first mounting position, a second mounting position, and a third mounting position in sequence from the front to the rear, the first mounting position being located above the control valve assembly, the intermediate plate being provided with wire grooves at the second mounting position on opposite sides of a line connecting the first mounting position and the second mounting position; An ink cartridge assembly, comprising a plurality of ink cartridges, wherein the plurality of ink cartridges are arranged in an array at the first mounting position, and the plurality of ink cartridges are connected to the plurality of nozzles; A control panel assembly, in an array cabinet structure, is disposed on the second mounting position, and is used to control the inkjet printing of the nozzle; A degassing module assembly, comprising a plurality of degassing modules, wherein the plurality of degassing modules are arranged in an array at the third installation position, and the plurality of degassing modules are connected to the input ends of the plurality of ink cartridges by using pipelines passing through the wire groove; The top cover has an opening at the bottom. The opening is arranged outside the middle plate and abuts against the base. The bottom of the top cover is connected to the middle plate.

2. The printing carriage according to claim 1, wherein: The opposite side walls of the base are provided with fixing frames, and mounting rods are connected between the fixing frames on the opposite sides. Several control valves are fixed on the mounting rods, and the control valves are spaced apart along the length direction of the mounting rods.

3. The printing carriage according to claim 2, wherein: A fixing bar is provided in the middle of the fixing frame and is arranged at an angle to the horizontal plane. Both ends of the mounting rod are respectively connected to the fixing bar. There are at least two mounting rods, and at least two mounting rods are arranged at intervals along the fixing bar. Several control valves are distributed on at least two mounting rods.

4. The printing carriage according to claim 1, wherein: The first installation position is a groove, and a plurality of ink cartridge arrays are arranged in the groove. The connectors of the ink cartridges pass through the bottom of the groove and are connected to the control valve.

5. The printing carriage according to claim 4, wherein: The top wall of the base is shared by the middle plate, and a through groove is provided on the middle plate at the first mounting position. A sealing plate is provided in the through groove, and the sealing plate includes a bottom plate sunk into the through groove and side walls extending upward from opposite sides of the bottom plate and abutting against the through groove. The sealing plate and the through groove form the groove, and a number of the ink cartridges are fixed on the bottom plate of the sealing plate.

6. The printing carriage according to claim 5, wherein: The ink cartridge adopts a connecting piece which passes through the bottom plate from below the bottom plate and is detachably connected to the ink cartridge.

7. The printing carriage according to claim 1, wherein: The intermediate plate is provided with a mounting frame at the third mounting position, and the mounting frame includes a cross bar, and the cross bar is provided with a plurality of clamping members configured one by one with the plurality of degassing modules at intervals along its length direction, and the degassing modules are detachably clamped on the clamping members.

8. The printing carriage according to claim 7, wherein: The holding member includes two spring pieces with an arc-shaped structure, and the two spring pieces are arranged opposite to each other to form an opening for the degassing module to enter and exit, and a space for accommodating the degassing module.

9. The printing carriage according to claim 1, wherein: A first window is provided at a position on the front side of the top cover corresponding to the ink cartridge assembly, and the first window is provided with a first panel made of a transparent material; A second window is provided on the front side of the base. The second window is provided with a second panel. The second panel is made of transparent material.

10. The printing carriage according to claim 1, wherein: A connecting hole is provided on the side of the middle plate, and a strip through groove is provided on the side wall of the top cover opposite to the connecting hole. The strip through groove extends toward the side of the base to the edge of the side wall of the top cover, and a connecting piece is sequentially passed through the strip through groove and the connecting hole to connect and fix the top cover to the middle plate.

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