Split type carriage unit of needle type certificate printer
By using a split-type printing carriage design and the application of die-cast aluminum alloy materials, the problem of high cost of integral die-cast parts was solved, achieving high-precision and low-cost printing results, and simplifying the mold structure.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-14
- Publication Date
- 2026-03-17
AI Technical Summary
The type carriage of existing dot matrix certificate printers is a single die-cast component, which results in high part costs, complex mold structures, and low cost-effectiveness.
The design adopts a split-type letter car, including a guide plate, a split assembly mechanism and a guide slider. It uses die-cast aluminum alloy material and is assembled with components such as slots, plates and limit hooks to reduce mold complexity and component costs.
It improves printing accuracy and stability, simplifies mold structure, reduces component costs, and maintains good heat dissipation performance.
Smart Images
Figure CN223999210U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of printing device technology, specifically relating to a split type carriage of a dot matrix certificate printer. Background Technology
[0002] With the rapid pace of my country's informatization construction, printing technologies and printer types are becoming increasingly diverse, and the use of laser and inkjet printers is growing. However, for special industries such as automatic bank passbook updates, bank counter receipt printing, and printing of certificates such as real estate documents, passports, file boxes, medical records, and vaccination records, laser and inkjet printers are inadequate, which necessitates dot matrix printers.
[0003] As a special type of printer, dot matrix printers have a unique adaptability to special printing media that other ordinary printers cannot match. The printhead, as one of the core components of a dot matrix printer, directly affects the printer's performance and cost.
[0004] Currently, most certificate printer printing carriages on the market are made of integral die-cast parts. Although they have good mechanical strength and heat dissipation performance, the parts are expensive, the mold structure is complex, and the investment is large, resulting in a very low cost-effectiveness. Utility Model Content
[0005] (1) Technical problems to be solved
[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a split type carriage for a dot matrix certificate printer. The aim is to solve the problem that the type carriages of existing certificate printers are basically integral die-cast parts. Although they have good mechanical strength and heat dissipation performance, the parts cost is high, the mold structure is complex, the investment is large, and the cost-effectiveness is very low.
[0007] (2) Technical solution
[0008] To solve the above-mentioned technical problems, this utility model provides a split type printhead for a dot matrix certificate printer, including a guide plate. A split assembly mechanism is installed on one side and below the guide plate. The split assembly mechanism includes a guide assembly and a lower half of the printhead. A printhead guide shaft passes through the middle of the lower half of the printhead. A printhead is installed on the inner side of the lower half of the printhead, and an installation mechanism is installed at the connection between the printhead and the lower half of the printhead. An upper half of the printhead is provided below the guide assembly, and the lower section of the upper half of the printhead is connected to the lower half of the printhead. An assembly assembly is installed at the connection between the upper half of the printhead and the lower half of the printhead. An oil felt fixing chamber is fixed in the middle of the inner side of the upper half of the printhead.
[0009] Furthermore, the guide assembly includes a guide slider, which is installed on the inner side of a section of the guide plate. An installation cylinder is fixedly provided on the inner side of the upper section of the upper half of the letter carrier, and a guide roller is installed around one end of the installation cylinder. A pin is installed in the middle of the guide roller.
[0010] Furthermore, the guide slider includes an elastic arm a, which is attached to and movable within a section of the guide plate, and a thin sheet b is fixed at the inner end of the elastic arm a.
[0011] Furthermore, the assembly includes fixing blocks, which are located on both sides of the upper half of the letter carrier. A screw groove is provided in the middle of the two fixing blocks, and a first fixing screw is screwed into the middle of the screw groove.
[0012] Furthermore, the upper half and lower half of the letter carrier are connected and assembled together by a combination component.
[0013] Furthermore, the mounting mechanism includes a slot, which is located on the inner side of the lower half of the print head. A retaining plate is provided at the rear end of the print head, and a limiting hook is provided at the lower front section of the print head. A limiting groove is provided on one side of the front end of the lower half of the print head, and a mounting groove is provided on the other side of the front end of the lower half of the print head. A left and right limiting spring is provided on the lower side of the lower half of the print head, and a second fixing screw is installed at the upper center of the left and right limiting spring.
[0014] Furthermore, the left and right limiting springs are fixedly connected to the lower half of the letterpress by a second fixing screw.
[0015] (3) Beneficial effects
[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0017] In the process of printing dot matrix certificates, this utility model's device, consisting of the upper and lower halves of the print carriage, moves horizontally left and right along a guide plate under the guidance of the print carriage guide shaft, in conjunction with guide rollers and guide sliders. This allows the print head to perform printing operations synchronously. The guide plate limits the back-and-forth swaying of the print carriage, which could affect printing accuracy. Furthermore, the guide slider, composed of an elastic arm a and a thin plate b, allows the guide rollers of the print carriage to slide close to and on the guide plate, improving stability, while the thin plate b allows for left and right movement of the print carriage. The printing process achieves the effect of positioning the print head by blocking the photocoupler. It is worth mentioning that since the lower part of the print head is used to fix the print head, its material is die-cast aluminum alloy. Die-cast aluminum alloy has high strength and excellent thermal conductivity. The material can conduct the heat generated by printing and transfer it to the metal frame of the printer through the print head guide shaft to achieve heat dissipation. The heat dissipation effect is basically the same as that of the print head under integral die casting. Therefore, compared with integral die casting print head, this solution uses a split print head, which can greatly simplify the complexity of integral print head mold and effectively reduce the cost of parts.
[0018] The lower half of the print head and the print carriage can be installed using a snap-fit method using slots, plates, limiting hooks, limiting grooves, and other components, making disassembly and replacement more convenient. At the same time, the left and right limiting springs provided on one side of the inner side of the lower half of the print carriage can limit the print head, so that the print head can always be close to the right side of the lower half of the print carriage, preventing the print head from slightly wobbling on the print carriage during bidirectional printing and affecting the printing accuracy. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0021] Figure 2 This is a schematic diagram of the three-dimensional structure of the modular assembly mechanism;
[0022] Figure 3 This is a schematic diagram of the split assembly mechanism and the disassembled printhead structure;
[0023] Figure 4 This is a schematic diagram of the three-dimensional structure of the printhead.
[0024] The labels in the attached diagram are as follows: 1. Guide plate; 2. Split assembly mechanism; 21. Guide assembly; 211. Guide slider; 211a. Elastic arm; 211b. Thin sheet; 212. Mounting cylinder; 213. Guide roller; 214. Pin; 22. Upper half of the print head; 23. Assembly assembly; 231. Fixing block; 232. Screw groove; 233. First fixing screw; 24. Oil felt fixing chamber; 25. Lower half of the print head; 3. Print head guide shaft; 4. Print head; 5. Mounting mechanism; 51. Slot; 52. Plate; 53. Limiting hook; 54. Limiting groove; 55. Mounting groove; 56. Left and right limiting springs; 57. Second fixing screw. Detailed Implementation
[0025] 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 only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] This specific embodiment is a split-type type carriage of a dot matrix certificate printer, and its structural diagram is shown below. Figures 1 to 4As shown, the system includes a guide plate 1. A split assembly mechanism 2 is installed on one side and below the guide plate 1. The split assembly mechanism 2 includes a guide assembly 21 and a lower half of the print head 25. A print head guide shaft 3 is inserted through the middle of the lower half of the print head 25. A print head 4 is installed on the inner side of the lower half of the print head 25, and an installation mechanism 5 is installed at the connection between the print head 4 and the lower half of the print head 25. An upper half of the print head 22 is provided below the guide assembly 21. The guide assembly 21 includes a guide slider 211, which is installed on the inner side of a section of the guide plate 1. An installation cylinder 212 is fixed on the inner side of the upper section of the upper half of the print head 22, and a guide roller 213 is installed around one end of the installation cylinder 212. A pin 214 is installed in the middle of the guide slider 211, which includes an elastic arm 211a. The elastic arm 211a is attached to and moves within a section of the guide plate 1. A thin plate 211b is fixed at the inner end of the elastic arm 211a. The lower section of the upper half 22 of the letter carrier is connected to the lower half 25 of the letter carrier. A combination assembly 23 is installed at the connection between the upper half 22 and the lower half 25 of the letter carrier. The combination assembly 23 includes a fixing block 231, which is located on both sides of the upper half 22 of the letter carrier. A screw groove 232 is opened in the middle of the two fixing blocks 231, and a first fixing screw 233 is screwed in the middle of the screw groove 232. The upper half 22 and the lower half 25 of the letter carrier are connected by the combination assembly 23 to form a combination assembly. The upper half 22 of the printhead carriage is connected to the inner center of the printhead carriage, and a felt fixing chamber 24 is fixed therein. During the printing of dot matrix certificates, the printhead carriage, which is connected to the lower half 25 of the printhead carriage, carries the printhead 4. Under the guidance of the printhead carriage guide shaft 3, the printhead carriage moves horizontally left and right along the guide plate 1 with the guide roller 213 and the guide slider 211. Thus, the printhead 4 can perform printing operations simultaneously. The presence of the guide plate 1 can limit the back-and-forth swing of the printhead carriage, which would affect the printing accuracy. Since the guide slider 211 is composed of an elastic arm 211a and a thin plate 211b, the elastic arm 211a can make the guide roller 213 of the printhead carriage close to the guide plate 1 and on the guide plate 1. The sliding mechanism improves stability, and the thin sheet 211b can block the optical coupler to achieve the effect of positioning and printing the print head when the print head moves left and right. It is worth mentioning that since the lower half 25 of the print head is used to fix the print head 4, its material is die-cast aluminum alloy. Die-cast aluminum alloy has high strength and excellent thermal conductivity. Its material can conduct the heat generated by printing and transfer it to the metal frame of the printer through the print head guide shaft 3 to achieve heat dissipation. The heat dissipation effect is basically the same as that of the print head under the whole die casting. Therefore, compared with the whole die casting print head, the split print head of this solution can greatly simplify the complexity of the whole print head mold and effectively reduce the cost of parts.
[0027] The mounting mechanism 5 includes a slot 51 located inside the lower half of the print head 25. A retaining plate 52 is located at the rear end of the print head 4, and a limiting hook 53 is located at the lower front section of the print head 4. A limiting groove 54 is located on one side of the front end of the lower half of the print head 25, and a mounting groove 55 is located on the other side of the front end of the lower half of the print head 25. Left and right limiting springs 56 are located on one side of the lower part of the lower half of the print head 25, and a second fixing screw 57 is installed at the upper center of the left and right limiting springs 56. The left and right limiting springs 56 are secured by the second fixing screw. The screw 57 forms a threaded connection with the lower half of the printhead carriage 25. The lower half of the printhead carriage 25 and the printhead 4 can also be installed by snapping together using the slot 51, the plate 52, the limiting hook 53, the limiting groove 54, and other components. This makes disassembly and replacement more convenient. At the same time, the left and right limiting springs 56 provided on one side of the inner side of the lower half of the printhead carriage 25 can limit the printhead 4, so that the printhead 4 can always be close to the right side of the lower half of the printhead carriage 25, preventing the printhead 4 from slightly wobbling left and right on the printhead carriage during bidirectional printing, which would affect the printing accuracy.
[0028] Working Principle: During the printing of dot matrix certificates, the upper half 22 and lower half 25 of the print carriage, together, carry the printed head 4 horizontally along the guide plate 1 under the guidance of the print carriage guide shaft 3, in conjunction with the guide rollers 213 and guide sliders 211. This allows the printed head 4 to perform printing operations simultaneously. The guide plate 1 limits the back-and-forth swaying of the print carriage, which could affect printing accuracy. The guide slider 211, composed of an elastic arm 211a and a thin plate 211b, allows the guide rollers 213 to slide close to and on the guide plate 1, improving stability. The thin plate 211b, by blocking the photocoupler during left-right movement, achieves print carriage positioning. Notably, the lower half 25, used to fix the printed head 4, is made of die-cast aluminum alloy. While possessing high strength, it also exhibits excellent thermal conductivity. The material can conduct the heat generated during printing and transfer it to the printer's metal frame through the carriage guide shaft 3 to achieve heat dissipation. The resulting heat dissipation effect is essentially equivalent to that of a die-cast carriage. Therefore, compared to a die-cast carriage, this solution uses a split carriage, which greatly simplifies the complexity of the die-cast carriage mold and effectively reduces component costs. Furthermore, the lower half of the carriage 25 and the print head 4 can be connected via a snap-fit installation using slots 51, plates 52, limit hooks 53, and limit grooves 54, making disassembly and replacement more convenient. Additionally, the left and right limit springs 56 on one side of the lower half of the carriage 25 can limit the print head 4, ensuring that the print head 4 remains close to the right side of the lower half of the carriage 25 during bidirectional printing, preventing slight left and right wobbling of the print head 4 on the carriage that could affect printing accuracy.
[0029] All technical features in this embodiment can be freely combined according to actual needs.
[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A split carriage for a pin certificate printer, comprising a guide plate (1), characterized in that, One side and the lower part of the guide plate (1) is provided with a split combination mechanism (2), which comprises a guide assembly (21) and a lower half of a carriage (25), and the middle part of the lower half of the carriage (25) penetrates the guide shaft (3), the inner side of the lower half of the carriage (25) is provided with a print head (4), and the connection part of the print head (4) and the lower half of the carriage (25) is provided with a mounting mechanism (5), the lower part of the guide assembly (21) is provided with an upper half of a carriage (22), and the lower part of the upper half of the carriage (22) is connected with the lower half of the carriage (25), the connection part of the upper half of the carriage (22) and the lower half of the carriage (25) is provided with a combination assembly (23), and the inner side of the middle part of the upper half of the carriage (22) is fixedly provided with a linoleum fixing bin (24).
2. The split carriage of claim 1, wherein: The guide assembly (21) comprises a guide slider (211), and the guide slider (211) is mounted on the inner side of a section of the guide plate (1), the upper inner side of the upper half of the carriage (22) is fixedly provided with a mounting cylinder (212), and the periphery of one end of the mounting cylinder (212) is provided with a guide roller (213), and the middle part of the guide roller (213) is provided with a pin (214).
3. The split-carriage of claim 2, wherein, The guide slider (211) comprises an elastic arm (211a), and the elastic arm (211a) is movably attached to the inner side of a section of the guide plate (1), and the inner end of the elastic arm (211a) is fixedly provided with a sheet (211b).
4. The split-carriage for a pin-set printer of claim 1, wherein, The combination assembly (23) comprises a fixed block (231), and the fixed block (231) is arranged on both sides of the upper half of the carriage (22), the middle part of the two fixed blocks (231) is provided with a screw groove (232), and the middle part of the screw groove (232) is screwed with a first fixed screw (233).
5. The split-carriage for a pin-set printer of claim 1, wherein, The upper half of the carriage (22) and the lower half of the carriage (25) are combined and connected through the combination assembly (23).
6. The split-carriage for a pin-set printer of claim 1, wherein, The mounting mechanism (5) comprises a clamping groove (51), and the clamping groove (51) is arranged on the inner side of the lower half of the carriage (25), the rear end of the print head (4) is provided with a clamping plate (52), the front lower part of the print head (4) is provided with a limiting hook rod (53), the front end of one side of the lower half of the carriage (25) is provided with a limiting groove (54), the front end of the other side of the lower half of the carriage (25) is provided with a mounting groove (55), the lower part of one side of the lower half of the carriage (25) is provided with a left and right limiting elastic sheet (56), and the upper middle part of the left and right limiting elastic sheet (56) is provided with a second fixed screw (57).
7. The split-carriage of claim 6, wherein, The left and right limiting elastic sheet (56) is threadedly connected with the lower half of the carriage (25) through the second fixed screw (57).