Thermal printer with uncovering limiting function

Abstract

The utility model provides a thermal printer of uncovering limit, including machine cover, machine base, thermosensitive module and rubber covered roller, machine base is provided with hinge groove, hinge groove is provided with first hinge portion and clamp post, machine cover is provided with hinge post, hinge post is J-shaped arrangement, the hook portion of hinge post is provided with second hinge portion, and the second hinge portion is provided with second hinge portion. Through the hinged columns arranged in a J shape, interference between the machine cover and the machine base is avoided when the machine cover is opened in a rotating mode, the cover body is opened smoothly, the machine cover is kept at the position through clamping of the extending parts and the clamping columns, and when the machine cover needs to be covered, the machine cover is in sliding fit with the clamping columns through external force and the arc-shaped end faces, so that the machine cover is prevented from being damaged. Through the elastic deformation of the clamping column, the extending part can be separated from the clamping column, and then the opening position of the machine cover is released.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of thermal printing, especially to a thermal printer with cover limiting. BACKGROUND

[0002] With the popularization and application of thermal printers, thermal printers are used not only in automatic teller machines of banks, cash desks of supermarkets and delivery places of e-commerce, but also in the printing of commercial fields such as e-commerce and express industry, and portable thermal printers are gradually widely used in personal consumption fields.

[0003] The thermal printer is generally provided with a cover, a base, a thermal sheet and a rubber roller. The printing paper is input to the rubber roller and the thermal sheet, and then an image is formed by printing. Since the printing paper needs to be replaced, the cover of the thermal printer needs to be frequently opened, and the cover is closed after replacement, and the thermal sheet is opposite to the rubber roller.

[0004] When the cover is opened, the cover needs to be supported, so that the printing paper can be conveniently operated. Since the cover and the base are connected by a cable, the wiring structure of the cable also needs to be considered. SUMMARY

[0005] The utility model aims at providing a thermal printer with cover limiting.

[0006] In order to realize the purpose of the utility model, the utility model provides a thermal printer with cover limiting, which comprises a cover, a base, a thermal module and a rubber roller. The thermal module is arranged on the cover, the rubber roller is rotatably arranged on the base, the cover is hingedly connected with the base, an entry port and an exit port are formed between the cover and the base, the entry port and the exit port are respectively located on the front side and the rear side of the paper length direction, the thermal module and the rubber roller are opposite to each other and form a paper running channel, and the paper running channel is connected between the entry port and the exit port. The base is provided with a clamping groove at both ends of the exit port based on the paper width direction, the cover is provided with a locking column at both ends of the exit port based on the paper width direction, the locking column is detachably clamped with the clamping groove, the base is provided with a hinged groove at both ends of the entry port based on the paper width direction, a first hinge part is arranged on the rear side of the paper length direction in the hinged groove, a clamping column is arranged on the front side of the paper length direction in the hinged groove, the cover is provided with a hinged column at both ends of the entry port based on the paper width direction, the hinged column is arranged in a J shape, the top end of the hinged column is fixedly connected with the cover, the hook part of the hinged column is provided with a second hinge part, the curved part between the top end and the hook part of the hinged column is provided with a protruding part protruding outward, one side of the hinged column protrudes into the corresponding hinged groove on one side, and the first hinge part is hingedly connected with the second hinge part. When the cover is closed, the protruding part is separated from the clamping column. When the cover is opened, the protruding part is clamped with the clamping column.

[0007] In a further aspect, the protruding part is provided with an arc-shaped end face, and the arc-shaped end face is in sliding cooperation with the clamping column.

[0008] Further, the card column is provided with a positioning step, and the arc-shaped end surface is located above the positioning step and is clamped with the positioning step when the cover is opened.

[0009] Further, the card column extends in the vertical direction, the upper end of the card column is fixedly connected with the base, and the positioning step is located at the lower end of the card column and moves based on the elastic deformation of the card column.

[0010] Further, the hinge column is provided with a threading groove, and the threading groove is communicated between the cover and the base.

[0011] Further, the thermal printer further comprises a main control circuit board and a data line, the main control circuit board is arranged in the base and below the hinge groove, the data line is connected between the main control circuit board and the thermal module, and the data line passes through the threading groove.

[0012] The thermal printer has the advantages that the hinge column is arranged in the J shape, the hinge of the two hinge parts is utilized, the interference between the cover and the base is avoided when the cover is opened, the cover is smoothly opened, the extension part is clamped with the card column, the opening position of the cover is kept when the cover is opened, the extension part is separated from the card column when the cover needs to be closed, the opening position of the cover is released, the lock column is clamped with the clamping groove, the cover is stably closed, the threading groove is arranged, the wiring of the data line is facilitated, and the wiring of the data line does not affect the opening of the cover. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a structural diagram of an embodiment of the thermal printer.

[0014] Figure 2 is a structural diagram of an embodiment of the thermal printer after the cover is opened.

[0015] Figure 3 is a structural diagram of the cover in the embodiment of the thermal printer.

[0016] Figure 4 is a sectional view of the embodiment of the thermal printer when the cover is closed.

[0017] Figure 5 is a sectional view of the embodiment of the thermal printer when the cover is opened.

[0018] The thermal printer is further described below in combination with the drawings and embodiments. DETAILED DESCRIPTION

[0019] Referring to Figures 1 to 5The thermal printer includes a cover 2, a base 1, a thermal module 211, and a rubber roller 111. The thermal module 211 is mounted on the cover 2, and the rubber roller 111 is rotatably mounted on the base 1. The cover 2 is hinged to the base 1, and a paper inlet 102 and a paper outlet 101 are formed between the cover 2 and the base 1. The paper inlet 102 and the paper outlet 101 are located at the front and rear sides of the paper in the X direction of paper length, respectively. The thermal module 211 and the rubber roller 111 are opposite each other and form a paper feeding channel, which connects the paper inlet 101 and the paper outlet 102. The printing paper is input from the paper inlet 101 and fed along the paper feeding channel to the position between the thermal module 211 and the rubber roller 111, and output from the paper outlet 102 after printing is completed.

[0020] The base 1 has slots 112 at both ends of the paper outlet 101 in the paper width direction Y, and the cover 2 has locking pins 212 at both ends of the paper outlet 101 in the paper width direction Y. The locking pins 212 can be detachably engaged with the slots 112.

[0021] The machine base 1 has hinge slots 13 at both ends of the paper inlet 102 in the paper width direction Y. A first hinge part is provided on the rear side of the hinge slot 13 in the paper length direction X. The first hinge part can be arranged as a hinge hole or a hinge post. A locking post 131 is provided on the front side of the hinge slot 13 in the paper length direction X. The locking post 131 extends in the vertical direction. The upper end of the locking post 131 is fixedly connected to the machine base 1. The positioning step 133 is located at the lower end of the locking post 131. The positioning step 133 moves based on the elastic deformation of the locking post 131.

[0022] The cover 2 has hinge posts 22 at both ends of the paper inlet 102 in the paper width direction Y. The hinge posts 22 are arranged in a J-shape. The top end 222 of the hinge posts 22 is fixedly connected to the cover 2. The hook part of the hinge post 22 is provided with a second hinge part 221. The curved part between the top end 222 and the hook part of the hinge post 22 is provided with an outwardly protruding part 223. The protruding part 223 is provided with an arc-shaped end face. One side of the hinge post 22 extends into the hinge groove 13 on the corresponding side. The first hinge part and the second hinge part 221 are hinged together.

[0023] Reference Figure 4 When the cover 2 is closed, the protruding part 223 separates from the locking post 131, as shown in the reference. Figure 5 When the cover 2 is opened, the locking pin 212 is driven to separate from the slot 112, and then the cover 2 can be rotated open. As the cover 2 continues to open and rotate upward, the arc-shaped end face slides and engages with the locking pin 131, and then the protrusion 223 engages with the locking pin 131. The locking pin 131 is provided with a positioning step 133, and the arc-shaped end face is located above the positioning step 133 and engages with the positioning step 133.

[0024] The hinge post 22 is provided with a threading slot 224 which is communicated between the cover 2 and the base 1. The thermal printer further comprises a main control circuit board 14 and a data line. The main control circuit board 14 is arranged in the base 1 and below the hinge slot 13. The data line is connected between the main control circuit board 14 and the thermal module 211, and passes through the threading slot 224.

[0025] As can be seen from the above, by arranging the hinge post in a J shape and using the hinge of two hinge parts, the interference between the cover and the base is avoided when the cover is opened, the cover is smoothly opened, the extension part is clamped with the clamping post, the opening position of the cover is maintained when the cover is opened, the extension part is separated from the clamping post by external force and the sliding cooperation of the arc-shaped end face with the clamping post and the elastic deformation of the clamping post, the opening position of the cover is released, the clamping of the lock post with the clamping slot is cooperated, the stable closing of the cover is completed, and the arrangement of the threading slot facilitates the wiring of the data line and does not affect the opening of the cover.

Claims

1.A thermal printer with cover limiting, comprising a cover, a base, a thermal module and a rubber roller, the thermal module is arranged on the cover, the rubber roller is rotatably arranged on the base, the cover is hinged with the base, an entry port and an exit port are formed between the cover and the base, the entry port and the exit port are respectively located at the front side and the rear side of the paper length direction, the thermal module and the rubber roller are opposite and form a paper passing channel, the paper passing channel is communicated between the entry port and the exit port; characterized in that: the base is provided with a clamping groove at both ends based on the paper width direction at the exit port, the cover is provided with a locking column at both ends based on the paper width direction at the exit port, the locking column is separably clamped with the clamping groove; the base is provided with a hinge groove at both ends based on the paper width direction at the entry port, a first hinge part is arranged at the rear side of the paper length direction in the hinge groove, a clamping column is arranged at the front side of the paper length direction in the hinge groove; the cover is provided with a hinge column at both ends based on the paper width direction at the entry port, the hinge column is arranged in J shape, the top end of the hinge column is fixedly connected with the cover, a second hinge part is arranged on the hook part of the hinge column, an outward protruding part is arranged on the bending part between the top end and the hook part of the hinge column, one side of the hinge column protrudes into the corresponding side of the hinge groove, the first hinge part is hinged with the second hinge part; when the cover is closed, the protruding part is separated from the clamping column; when the cover is opened, the protruding part is clamped with the clamping column. 2.The thermal printer according to claim 1, characterized in that: the protruding part is provided with an arc-shaped end face, the arc-shaped end face is slidingly matched with the clamping column. 3.The thermal printer according to claim 2, characterized in that: the clamping column is provided with a positioning step, when the cover is opened, the arc-shaped end face is located above the positioning step and is clamped with the positioning step. 4.The thermal printer according to claim 3, characterized in that: the clamping column extends along the vertical direction, the upper end of the clamping column is fixedly connected with the base, the positioning step is located at the lower end of the clamping column, the positioning step moves based on the elastic deformation of the clamping column. 5.The thermal printer according to any one of claims 1 to 4, characterized in that: a threading groove is arranged in the hinge column, the threading groove is communicated between the cover and the base. 6.The thermal printer according to claim 5, characterized in that: the thermal printer further comprises a main control circuit board and a data line, the main control circuit board is arranged in the base and located below the hinge groove, the data line is connected between the main control circuit board and the thermal module, the data line passes through the threading groove. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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