阅读说明：本技术 打印机壳体组装结构 (Printer housing assembling structure ) 是由 金汉奉 于 2020-02-10 设计创作，主要内容包括：本发明涉及打印机壳体组装结构,更详细地,涉及一种不依赖另外的工具而是可以通过简单的手动操作快速执行打印机外壳体的组装过程和拆卸过程的打印机壳体组装结构。根据本发明的打印机壳体组装结构包括：打印机主体部；第一壳体,其设置在上述打印机主体部的一部分；第二壳体,其以围绕上述打印机主体部中的除了上述第一壳体的设置区域和盖设置开放部区域以外的区域的方式设置；卡挂颚部,其形成在上述打印机主体部和上述第一壳体上以组装上述第一壳体；防脱部,其形成在上述第一壳体和上述第二壳体上以防止上述第一壳体从上述卡挂颚部脱离；以及组装钩机构,其以钩结构形成,形成在上述打印机主体部和上述第二壳体上以组装上述第二壳体。(The present invention relates to a printer housing assembly structure, and more particularly, to a printer housing assembly structure which can quickly perform an assembly process and a disassembly process of a printer housing by a simple manual operation without depending on a separate tool. The printer casing assembling structure according to the present invention comprises: a printer main body; a first casing provided in a part of the printer main body; a second casing provided so as to surround a region other than a region where the first casing is provided and a region where the cover is provided and opened in the printer main body; a jaw portion formed on the printer main body portion and the first housing to assemble the first housing; a disengagement prevention section formed on the first housing and the second housing to prevent the first housing from disengaging from the engagement jaw section; and an assembly hook mechanism formed in a hook structure on the printer main body and the second housing to assemble the second housing.)

1. A printer casing assembly structure is characterized in that,

the method comprises the following steps:

a printer main body;

a first housing provided in a part of the printer main body;

a second casing provided so as to surround a region other than a region where the first casing is provided and a region where a cover is provided open in the printer main body;

a jaw portion formed on the printer main body portion and the first housing to assemble the first housing;

a disengagement preventing portion formed on the first housing and the second housing to prevent the first housing from disengaging from the catching jaw portion; and

an assembly hook mechanism formed in a hook structure and formed on the printer main body portion and the second housing to assemble the second housing.

2. The printer housing assembly structure of claim 1,

the assembly hook mechanism includes:

a support hook member including an elastic support portion protruding from the printer main body portion, and a support hook formed on the elastic support portion; and

and a support hook engaging portion formed on the second housing so as to be opposed to the support hook member.

3. The printer housing assembly structure of claim 1,

the assembly hook mechanism includes:

a support hook member including an elastic support portion protruding from the second housing, and a support hook formed on the elastic support portion; and

and a support hook engaging portion formed on the printer main body so as to be opposed to the support hook member so as to be engaged with the support hook member.

4. The printer housing assembly structure of claim 2 or 3,

the support hook member is also formed with a handle portion for detachment.

5. The printer housing assembly structure of claim 2,

the second housing includes:

a bottom plate formed with an opening;

side plates erected on both sides of the bottom plate;

a rear plate vertically disposed behind the bottom plate; and

a main body mounting plate extending from the rear plate in parallel with the bottom plate,

the main body mounting plate is provided with the support hook engaging portion on one side of a plate body, and a main body support protrusion portion mounted on the bottom of the printer main body is formed on a free end of the plate body,

the support hook hooking part includes:

a hook mounting protrusion formed with an introduction opening into which the support hook member is inserted;

a reinforcing protrusion extending from the hook mounting protrusion; and

and a guide wedge formed at an upper portion of the reinforcing protrusion and guiding the restraint with the support hook member.

6. The printer housing assembly structure of claim 1,

the coming-off prevention portion includes:

a drop-off prevention groove formed on the first housing; and

and a protrusion formed at an end of the second housing facing the separation preventing groove and inserted into the separation preventing groove.

7. The printer housing assembly structure of claim 1,

the jaw portion includes:

sliding protrusions formed on both sides of the first housing, an

And a slide projection moving groove including a horizontal moving groove portion formed in the printer main body portion facing the slide projection, and a vertical moving groove portion communicating with the horizontal moving groove portion.

8. The printer housing assembly structure of claim 1,

includes a shaking prevention protrusion formed at a portion of the printer main body portion contacting the first housing to prevent shaking of the first housing combined to the printer main body portion.

9. The printer housing assembly structure of claim 1,

includes an opening/closing cover portion which is provided openably and closably in the cover opening portion of the printer main body portion to replace a sheet,

the opening/closing cover portion includes a hinge member having a hinge shaft with a hook at an arc-shaped hinge guide portion,

the printer main body includes a bearing member having a hinge hole into which the hinge shaft is inserted.

Technical Field

The present invention relates to a Printer housing Assembly Structure (Assembly Structure Of Printer Case), and more particularly, to a Printer housing Assembly Structure that can quickly perform an Assembly process and a disassembly process Of a Printer housing by a simple manual operation without depending on a separate tool.

Background

From printers connected to computer networks and printing on paper media in an inkjet manner to invoice printers and label printers in a thermal printing manner, 3D printers, semiconductor or circuit fabrication printers, and post-it note printers recently introduced for office use, etc., printers come into the market in a variety of products depending on the print medium, the printing method, and the customized manner of use.

Hereinafter, an assembly structure of a case of an existing thermal printer will be exemplarily described based on a structure of the thermal printer disclosed in korean patent laid-open No. 1679197 of the present applicant.

In general, a thermal printer is a type of non-impact printer, and is used as a point of sale (POS) printer because it has a relatively simple structure and a relatively small volume, and is suitable for printing simple invoices, lists, and the like, as a printing mechanism that prints characters and pictures by using a thermal recording paper (hereinafter, referred to as "printing paper") that is a special paper that reacts to heat and heating and developing the color of the paper by a print head (thermal head).

The' 197 patent discloses a thermal printer as a printer capable of changing a paper discharge manner of a printing paper between a front paper discharge manner-a top paper discharge manner, greatly improving convenience for a user and merchantability.

That is, as shown in fig. 1a and 1b, the printer of the' 197 patent is composed of a main body case 200, a top cover 300, a front cover 400, a print head unit 500, a platen roller unit 600, and a guide block 700. If the user needs to use the printing paper P of the printer 100 in the previous paper discharge manner, as shown in fig. 1a, it is used in a manner of attaching the guide block 700 to the first receiving portion of the top cover 300, and if the user needs to use the printing paper P of the printer 100 in the top paper discharge manner, as shown in fig. 1b, it is used in a manner of detaching the guide block 700 attached to the first receiving portion and attaching to the second receiving portion of the front cover 400. In this manner, the user can change the paper discharge manner of the printing paper of the printer 100 by changing the setting position of the guide block 700.

In terms of an assembly structure, as shown in regions a and b marked by a one-dot chain line in fig. 1a and 1b, the printer 100 of the 197' patent forms fastening bosses for assembly at fastening portions of the main body case 200 and the front cover 400, fastening portions inside the main body case 200, and the like, and fastens fastening screws to the fastening bosses for assembly.

Accordingly, the printer 100 needs to include the fastening boss and the reinforcing portion for reinforcing the fastening boss in order to fasten the fastening screw, and thus the detailed structure becomes complicated, and the fastening space needs to be secured, and therefore the entire size of the housing becomes large, and there is a portion that needs to be improved in an assembly structure in order to realize a compact product.

More specifically, since the printer 100 requires an assembly tool such as a screwdriver for assembling a fastening screw during mass production of products, a plurality of assembly operations such as holding, moving, and fastening of the assembly tool are required, and the assembly time increases, which lowers the productivity. In another point of view, this becomes a cause of increasing the labor cost for assembly, and also a cause of increasing the production cost due to the addition of auxiliary materials such as fastening screws, washers, and the like. Moreover, at a/S, an increase in product maintenance time and cost is inevitable, and the screw fastening manner is also likely to be worn or loosened due to frequent disassembly/assembly.

Therefore, it is necessary to simplify the parts and processes for assembling the printer housing, and specifically, this becomes the beginning of the tool-less (toolless) housing assembly structure.

(patent document 0001) korean granted patent No. 1679197 (2016.11.18) "printer capable of changing paper discharge method of printing paper"

(patent document 0002) japanese granted patent No. 5265972 (2013.05.10) "printer with groove"

(patent document 0003) japanese granted patent No. 5223854 (2013.03.22) "printer"

Disclosure of Invention

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a printer housing assembly structure capable of quickly and easily performing a disassembling and assembling process without using a separate assembling and disassembling tool.

The above object can be achieved by a printer housing assembly structure according to an aspect of the present invention, including: a printer main body; a first casing provided in a part of the printer main body; a second casing provided so as to surround a region other than a region where the first casing is provided and a region where the cover is provided and opened in the printer main body; a jaw portion formed on the printer main body portion and the first housing to assemble the first housing; a disengagement prevention section formed on the first housing and the second housing to prevent the first housing from disengaging from the engagement jaw section; and an assembly hook mechanism formed in a hook structure and formed on the printer main body and the second housing to assemble the second housing.

Here, the above-mentioned assembly hook mechanism may include: a support hook member including an elastic support portion protruding from the printer main body and a support hook formed on the elastic support portion; and a support hook engaging portion formed on the second housing so as to be opposed to the support hook member. The support hook member may include an elastic support portion protruding from the second housing and a support hook formed on the elastic support portion, the support hook engaging portion may be formed on the printer body portion facing each other, and the support hook member may further include a detachable handle portion.

Also, the second housing may include: a bottom plate formed with an opening; side plates vertically arranged on both sides of the bottom plate; a rear plate vertically disposed behind the bottom plate; and a main body mounting plate extending from the rear plate in parallel with the bottom plate, wherein the main body mounting plate may have the support hook engaging portion formed on one side of a plate body, and a main body support protrusion portion formed on a free end of the plate body and attached to a bottom of the printer main body, and the support hook engaging portion may include: a hook mounting protrusion having an inlet into which the support hook member is inserted; a reinforcing protrusion extending from the hook mounting protrusion; and a guide wedge formed on an upper portion of the reinforcing protrusion and guiding the restraint with the support hook member.

Further, the coming-off preventing part may include: a drop-off prevention groove formed in the first housing; and a protrusion formed at an end of the second housing facing the separation preventing groove and inserted into the separation preventing groove.

Further, the jaw portion may include: and a sliding protrusion moving groove formed in the printer main body opposite to the sliding protrusion, and including a horizontal moving groove portion and a vertical moving groove portion communicating with the horizontal moving groove portion.

Further, the printer housing assembly structure may further include a shaking prevention protrusion formed at a portion where the printer body and the first housing are in contact with each other to prevent the first housing coupled to the printer body from shaking. The printer further includes an opening/closing cover portion that is provided to be openable and closable on the cover-provided opening portion of the printer main body portion to replace a sheet, the opening/closing cover portion including a hinge member formed with a hinge shaft having a hook at an arc-shaped hinge guide portion, and the printer main body portion including a bearing member formed with a hinge hole into which the hinge shaft is inserted.

According to the printer housing assembly structure of the present invention, the assembly process and the disassembly process can be rapidly performed by a simple manual operation without depending on a separate tool, so that not only productivity can be improved, but also production cost and maintenance cost can be reduced.

Further, since a protruding structure such as a fastening boss for assembling the outer case and an auxiliary material such as a fastening screw are not required, a detailed structure can be simplified and simplified, and since a fastening space for the fastening screw does not need to be secured, a compact case can be realized, and thus merchantability and market competitiveness of the product can be improved.

Drawings

FIG. 1a and FIG. 1b are views for explaining an assembling structure of a conventional printer housing,

figure 2 is a perspective view showing an assembled state of a printer housing according to an embodiment of the present invention,

fig. 3 is a disassembled perspective view for explaining a printer housing assembling structure according to an embodiment of the present invention,

figure 4 is a perspective view showing the main housing of the printer housing according to one embodiment of the present invention,

fig. 5 is a perspective view showing an opening and closing cover portion of a printer housing according to an embodiment of the present invention,

fig. 6 is a partially cut-away perspective view of a main portion of a support hook member and a support hook catching portion for explaining a printer housing assembling structure according to an embodiment of the present invention,

fig. 7 is a partially cut-away perspective view of a main portion of a catching jaw for explaining a printer housing assembling structure according to an embodiment of the present invention,

fig. 8 is a partially cut-away perspective view of a main portion for explaining a coming-off preventing portion of a printer housing assembling structure according to an embodiment of the present invention,

fig. 9a and 9b are views for explaining a front case assembling process of the printer housing assembling structure according to an embodiment of the present invention, fig. 9a is a schematic view showing a preparation state before assembly of the front case, fig. 9b is a schematic view showing a state in which assembly of the front case is completed,

fig. 10a and 10b are views for explaining a process of assembling the main casing of the printer casing assembling structure according to the embodiment of the present invention, fig. 10a is a schematic view showing a state where the main casing is temporarily assembled to the front casing, fig. 10b is a schematic view showing a state where the main casing is completely assembled,

fig. 11a and 11b are sectional views of main parts for explaining an assembly hook mechanism applicable to the printer housing assembly structure according to the second and third embodiments of the present invention.

Description of the symbols

Printer body 2, head unit

3 main case 31 bottom plate

32 side plates 33 rear plates

34 main body mounting plate 35 auxiliary cover member

5 opening and closing lid 51 cover

52 hinge part 53 bearing part

55 platen roller unit 6 for engaging with jaw

61 sliding projection 62 sliding projection moving groove

7 anti-slip part 71 anti-slip guide member

72 fixing protrusion 8 Assembly hook mechanism

81 supporting hook member 811 elastic supporting portion

812 support hook 813 handle for disassembly

82 support hook engaging portion 821 hook mounting projection

822 reinforced protrusion 823 guide wedge

Detailed Description

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to fig. 2 to 11b, and the same reference numerals are assigned to the same constituent elements in fig. 2 to 11 b.

On the other hand, detailed descriptions about the constitution and the action and effect thereof which can be easily known from the general technique by a person having a general knowledge in the field are abbreviated or omitted in each drawing. Further, since the present invention is characterized by the printer housing assembly structure, the description and illustration of the relevant portions will be made around, and the description of the remaining portions will be simplified or omitted.

Fig. 2 is a perspective view showing an assembled state of a printer housing according to an embodiment of the present invention, fig. 3 is a disassembled perspective view for explaining an assembled structure of the printer housing according to an embodiment of the present invention, and fig. 4 is a perspective view showing a main housing of the printer housing according to an embodiment of the present invention.

Referring to fig. 2 to 4, the printer housing assembly structure according to an embodiment of the present invention is mainly characterized in that it is configured in such a manner that the processes of disassembling and assembling the housing provided outside the printer main body 1 can be performed by a simple manual operation without depending on another tool.

The printer main body 1 is formed of a plate-shaped member in a substantially hexahedral shape, is provided with a head unit 2, a printed circuit board (not shown), a drive module (not shown), and the like, and is provided with a housing portion for housing printing paper and the like. Here, the head unit 2 is implemented as, for example, a thermal head and performs a printing operation on printing paper.

The outer case is not particularly limited in form and may be configured in various configurations depending on the shape of the printer main body 1, but in the present embodiment, the outer case is configured by the main case 3, the front case 4, and the opening/closing lid portion 5, and is implemented to have a substantially hexahedral shape in an assembled state.

The main casing 3 is a part that forms a basic exterior of the printer main body 1 as a whole so as to surround a region other than a front casing installation region and an upper cover installation open region, and is configured by a bottom plate 31 formed on an installation surface, that is, in a bottom surface direction, side plates 32 erected on both sides of the bottom plate 31, a rear plate 33 erected behind the bottom plate 31, and a main body installation plate 34 extending in parallel to the bottom plate 31 on the rear plate 33.

The bottom plate 31 of the main casing 3 is formed with an opening 312 in the plate-shaped member. The user can insert his/her hand through the opening 312 to perform the operations of detaching and attaching the outer case, and can insert a wire to connect the power supply unit, the communication module, and the like provided in the lower portion of the printer main body 1. Further, an auxiliary cover member 35 for sealing the opening 312 is provided on the bottom plate 31. The auxiliary cover member 35 has a shape corresponding to the shape of the opening 312, and is configured to have a wire drawing opening 352 formed at the rear so that wires and the like can be drawn.

The side plate 32 seals the side surface of the printer main body 1, and is formed with an operation hole 322 for operating the open lever 15 and a speaker hole.

The main body mounting plate 34 is constituted by a plate body that supports the lower portion of the printer main body 1, and the plate body is formed on the lower portion of the main casing 3 in such a manner as to provide a space for installing the printer main body 1. A support hook catching portion 82 is formed on a side of the plate body adjacent to the rear plate 33.

On the other hand, the front case 4 is a case for sealing the front surface of the printer main body 1, and is formed of a front plate 41 and a rim 42 formed along the periphery of the rim thereof, and has a rectangular tubular shape.

Fig. 5 is a perspective view showing an opening and closing cover portion of a printer housing according to an embodiment of the present invention.

Referring to fig. 5, the opening and closing cover 5 is implemented as an upper case openably and closably provided on the upper open portion of the printer main body 1 to replace paper, and includes a cover plate 51 covering the upper open portion, and hinge members 52 provided on both sides of the cover plate 51 and performing a hinge operation when opening and closing. The hinge member 52 is formed with an arc-shaped hinge guide 521 and a hinge shaft 522 having a snap hook so that the opening and closing cover portion 5 can be set on the printer main body portion 1 by a simple insertion action. Correspondingly thereto, a bearing member 53 formed with a hinge hole 532 into which the hinge shaft 522 is inserted is provided on the printer main body 1.

Further, the opening and closing cover portion 5 is provided with a platen roller unit 55 integrated with the head unit 2 in the closed state. The platen roller unit 55 includes a member such as a platen roller, and transfers the printing paper between the platen roller and the print head unit 2, and smoothly transmits the pressure of the print head unit 2 to the printing paper.

Fig. 6 is a partially cut-away perspective view of a main portion for explaining a support hook member and a support hook catching portion of a printer housing assembling structure according to an embodiment of the present invention, fig. 7 is a partially cut-away perspective view of a main portion for explaining a catching jaw portion of a printer housing assembling structure according to an embodiment of the present invention, and fig. 8 is a partially cut-away perspective view of a main portion for explaining a coming-off preventing portion of a printer housing assembling structure according to an embodiment of the present invention. To facilitate understanding, enlarged views are added to a part of the constitution, and the enlarged parts in the respective drawings are clearly indicated by indicative lines.

Referring to fig. 6 to 8, the printer housing assembling structure according to the embodiment of the present invention has a catching jaw portion 6, a coming-off preventing portion 7, and an assembling hook mechanism 8 as a dismounting structure for assembling/disassembling the outer housing by a manual operation.

The hooking jaw 6 is formed on the printer main body 1 and the front case 4 so that the front case 4 can be attached and detached by manual operation.

For example, as shown in fig. 7, the hooking jaw 6 may be formed of a sliding projection 61 formed on the inner surface of both sides of the edge portion 42 of the front housing 4 and a sliding projection moving groove 62 formed at a position facing each other so that the sliding projection 61 is inserted and moved. Here, the sliding protrusion moving groove 62 is composed of a horizontal moving groove portion 621 formed to be recessed in a side surface of the printer main body 1, and a vertical moving groove portion 622 formed to be recessed so as to communicate with the horizontal moving groove portion 621.

The hooking jaw 6 may be configured in various ways as long as it can be coupled by moving the front case 4 in the horizontal direction and then in the vertical direction toward the main case 3, and is not particularly limited to the configuration and shape shown in fig. 7.

On the other hand, as shown in fig. 8, the retaining portion 7 is formed on the main casing 3 and the front casing 4 to prevent the front casing 4 assembled to the printer main body 1 from being detached, and is composed of a retaining guide member 71 and a fixing protrusion 72.

The escape guide member 71 is configured in a concave structure, that is, protrudingly formed on the inner surface of the lower side edge portion 42 of the front case 1, and a escape prevention groove 712 is configured in a gap with the inner surface of the tip end portion of the edge portion 42.

The corresponding fixed protrusion 72 is formed on the end of the bottom plate 31 facing the retaining guide 71, and is configured to have a recessed structure in which a protrusion 721 inserted into the retaining groove 712 of the retaining guide 71 and a locking jaw 722 abutting against the edge 42 are formed on the lower portion of the protrusion 721.

As shown in fig. 7, the printer main body 1 is provided with a protruding anti-shake projection 18 at a portion contacting the front case 4 to prevent shaking when the front case 4 is coupled. The anti-rocking projection 18 is in close contact with the edge portion 42 in the assembled state of the front case 4 to provide a supporting force, thereby performing an anti-rocking function.

The assembly hook mechanism 8 is configured by a support hook member 81 and a support hook engaging portion 82 as a component arranged to enable assembly and disassembly by a hook attachment/detachment structure.

The support hook member 81 is configured to be attached to and detached from the printer main body 1 by press-fitting without using a separate assembly tool, and is formed in a lower portion of the printer main body 1 so as to protrude to be caught by the support hook catching portion 82. The support hook member 81 includes an elastic support portion 811 projecting downward from the printer main body 1 so as to be elastically fixed to the support hook engaging portion 82, and a support hook 812 projecting in a substantially triangular barb shape from the elastic support portion 811.

Moreover, the support hook member 81 may also be configured to include a detachment handle portion 813 to be more easily detached from the printer main body portion 1 when detaching the main casing 3. The detachable grip portion 813 is formed of a grip piece integrally extending downward from the support hook 812.

On the other hand, a fixing piece 17 for more stably restraining the printer main body 1 to the main casing 3 is formed on the printer main body 1. The fixing piece 17 is in contact with the supporting hook member 81 and protrudes downward, and is formed of a rod-like member having a "T" -shaped cross-sectional structure, and is mounted on the rear plate 33 during assembly of the main casing 3. Also, the fixing piece 17 performs a stopper function of preventing the support hook member 81 from being broken by the manipulation of the user.

As shown in fig. 4 and 6, the support hook engaging portion 82 is formed to be opposed to the main casing 3 so as to be engaged with the support hook member 81, and includes a hook attachment projection 821 into which the support hook member 81 is inserted, a reinforcing projection 822 connected to the hook attachment projection 821 and formed to extend in a substantially arc shape, and a guide wedge 823 formed on an upper portion of the reinforcing projection 822 and guiding the restraint of the support hook member 81. Here, the hook mounting protrusion 821 is formed in a square box shape having a lead-in port 821a on the body mounting plate 34, and the guide wedge 823 is constituted by a triangular member formed with an inclined surface which comes into contact with the support hook 812 during ascent.

Hereinafter, the operation of the printer housing assembly structure according to an embodiment of the present invention will be briefly described with reference to fig. 3, 5, and 9a to 10 b.

Referring to fig. 3, the assembly process of the printer housing according to the embodiment of the present invention is carried out by assembling the opening and closing cover 5 to which the platen roller unit 55 is attached in a state where the print head unit 2, the drive module, and the like are built in the printer main body 1, and then assembling the main housing 3 after assembling the front housing 4 in the front face of the printer main body 1.

More specifically, as shown in fig. 5, the assembly process of opening and closing the cover portion 5 does not require the use of a separate assembly tool but can be simply assembled by inserting the hinge shaft 522 into the hinge hole 532 of the bearing member 53 in a state where the hinge member 52 is disposed in a manner corresponding to the bearing member 53 of the printer main body 1.

Fig. 9a and 9b are views for explaining a front case assembling process of the printer housing assembling structure according to the embodiment of the present invention, fig. 9a is a schematic view showing a preparation state before assembling the front case, and fig. 9b is a schematic view showing a state in which assembling of the front case is completed.

As shown in fig. 9a and 9b, in the assembly process of the front case 4, in a state where the front case 4 is disposed to face the printer main body 1, the sliding protrusion 61 is inserted into the sliding protrusion moving groove 62 and pushed in to move along the horizontal moving groove portion 621, and then an external force is applied downward, so that the mounting can be achieved after moving along the vertical moving groove portion 622, and therefore, the assembly can be easily performed without using a separate assembly tool. At this time, the anti-shake projection 18 formed on the printer main body 1 is supported in close contact with the inner surface of the edge portion 42, and therefore, the front case 4 can be prevented from shaking.

Fig. 10a and 10b are views for explaining a process of assembling the main casing of the printer casing assembling structure according to the embodiment of the present invention, fig. 10a is a schematic view showing a state in which the main casing is temporarily assembled to the front casing, and fig. 10b is a schematic view showing a state in which the main casing is completely assembled.

In the assembly process of the main casing 3, in a state where the side plates 32 on both sides are positioned on both sides of the printer main body 1 and the rear plate 33 is positioned on the rear surface of the printer main body 1, as shown in fig. 10a, the protrusion 721 of the fixing protrusion 72 formed on the end of the bottom plate 31 is inserted into the escape prevention groove 712 of the escape prevention guide 71.

When the bottom plate 31 and the rear plate 33 are pushed upward toward the printer main body 1 in this state, the support hook engaging portion 82 is inserted into the support hook member 81 and attached, and the engaging jaw 722 of the fixing protrusion 72 and the edge portion 42 of the front case 4 are integrated, so that the assembly can be easily performed without using a separate assembly tool.

When the main body case 3 is moved in the direction of the printer main body 1, as shown in fig. 10b, the inclined surface of the guide wedge 823 slides upward while coming into contact with the support hook 812, and the elastic support portion 811 returns after being slightly elastically deformed rearward, thereby performing the restraining operation of the support hook 812 and the support hook engaging portion 82.

When the assembly of the main casing 3 is completed as described above, the entire assembly of the casing is completed by pushing the auxiliary cover member 35 sealing the opening 312 of the bottom plate 31 and press-fitting the same.

On the other hand, the printer housing assembly structure according to an embodiment of the present invention does not require a separate disassembling tool at the time of maintenance, but can easily and quickly disassemble the main housing 3, the front housing 4, and the opening and closing cover 5 in the reverse order to the above-described assembly order.

For example, since the removal knob 813 is disposed on the support hook member 81 when the main casing 3 is removed, when the user grips the removal knob 813 and moves it in the opening direction after detaching the auxiliary cover member 35, the restrained state of the support hook 812 and the support hook engaging portion 82 is released, and the main casing 3 is detached into a state similar to the state shown in fig. 10a, so that the detachment can be easily performed without using a separate detaching tool.

The front case 4 is detached by lifting the front case 4 in the state shown in fig. 9b, the slide projection 61 is lifted along the vertical movement groove portion 622, and by pulling outward in this state, the slide projection 61 is moved along the horizontal movement groove portion 621 and detached.

In addition, the process of detaching the opening and closing cover portion 5 can be simply performed by a simple manual operation of disengaging the hinge shaft 522 of the hinge member 52 from the hinge hole 532 of the bearing member 53 without the aid of a separate assembling tool.

As such, the printer housing according to the embodiment of the present invention can not only improve productivity but also reduce production costs and maintenance expenses because assembly and disassembly can be performed quickly by simple manual operations.

The structure of the assembly hook mechanism 8 according to another embodiment of the present invention will be described below with reference to fig. 11a and 11 b.

Fig. 11a is a sectional view schematically showing a main part of an assembly hook mechanism applicable to a printer housing assembly structure according to a second embodiment of the present invention.

Referring to fig. 11a, the assembly hook mechanism 8 according to the second embodiment of the present invention is constituted by a support hook member 83 formed on the rear plate 33 of the main casing 3, and a support hook hooking portion 84 formed on the printer main body 1 opposed to the support hook member 83.

The support hook member 83 includes an elastic support portion 831 projecting from an extension portion 834 extending inward from the rear plate 33, a support hook 832 projecting from the elastic support portion 831 in a substantially triangular barb form, and a detachable grip portion 833 extending from the support hook 832. Here, the elastic support portion 831 is formed in a curved structure to secure elastic force for stable fixing. Although the elastic support portion 831 is formed in a substantially "-shaped" shape in the present embodiment, the elastic support portion 831 of the present invention is not limited thereto, but may be configured to be deformed into various shapes according to the shapes of the printer main body 1 and the main casing 3.

The support hook engaging portion 84 is formed at a position facing the lower portion of the printer main body 1 so as to be engaged with the support hook member 83, and as shown in fig. 11a, includes a hook mounting protrusion 841 protruding from the printer main body 1, and a guide wedge 842 formed on the hook mounting protrusion 841 and guiding the restriction with the support hook member 83.

Fig. 11b is a sectional view schematically showing a main part of an assembly hook mechanism applicable to the printer housing assembly structure according to the third embodiment of the present invention.

Referring to fig. 11b, the assembly hook mechanism 8 according to the third embodiment of the present invention is constituted by a support hook member 85 formed on the main body mounting plate 34 of the main casing 3, and a support hook catching portion 86 formed on the printer main body 1 opposed to the support hook member 85.

The support hook member 85 is composed of an elastic support portion 851 protruding upward from the body attachment plate 34, a support hook 852 protruding in a substantially triangular barb shape on the elastic support portion 851, and a removal grip portion 853 extending downward from the support hook 852. Here, the elastic support portion 851 is formed in a substantially "" -shaped curved structure to have elastic force for stable fixing.

The support hook engaging portion 86 is formed of a hook engaging hole formed in the fixing piece 17 of the printer main body 1 so as to be engaged with the support hook member 85. An inclined surface 171 for guiding and supporting the hook member 83 is formed at the lower end of the fixing piece 17.

The assembly and disassembly processes based on the assembly hook mechanism 8 according to the second and third embodiments of the present invention are largely the same as those of the assembly hook mechanism according to the first embodiment, and therefore, the repetitive description thereof is omitted for the sake of clear understanding by a brief description.

It is understood that although the configuration and assembly/disassembly of the printer according to the embodiment of the present invention have been described above, it is understood that a person having ordinary skill in the art can replace or modify a part of the above-described embodiment without departing from the scope of the technical idea of the present invention.

Therefore, the scope of the invention should be understood to cover the inventions set forth in the claims and their equivalents.