Key mounting structure and printer

Abstract

The utility model discloses a key mounting structure and printer, including installation shell, key assembly and prevent stupid muscle strip, installation shell side is provided with two bosses, and the boss is seted up with the mounting hole, and key assembly includes first muscle strip and second muscle strip, and first muscle strip has first end and second end, and second muscle strip has third end and fourth end, and the distance between first end and second end is L1, and the distance between third end and fourth end is L2, and the distance between third end to mounting hole center line and fourth end to mounting hole center line is L3, and the distance between two prevent stupid muscle strips along first direction is L4, and the distance between prevent stupid muscle strip to mounting hole center line is L5, satisfy: L1L4L2, L5L3. The utility model discloses through setting up prevent stupid muscle strip and utilizing size relation L1L4L2 and L5L3, make key assembly only can with correct direction install into the mounting hole of installation shell when installing, prevent key body error installation, ensure that key body mark always keep correct orientation.

Description

Technical Field

[0001] This utility model relates to the field of printer button installation technology, and in particular to a button installation structure and a printer. Background Technology

[0002] In the existing design of portable printers, the operation buttons are crucial components for human-computer interaction, typically handling tasks such as powering on, starting or stopping the printing program, and selecting and adjusting functions. Currently, the buttons on these printers generally employ a symmetrical design, meaning the physical outline of the button body is centrally or axially symmetrical. While this symmetrical structure results in a neat appearance, it also harbors a significant assembly hazard.

[0003] Specifically, because buttons themselves lack clear, asymmetrical directional features in their physical shape, assemblers cannot quickly and accurately determine the correct installation position of buttons with functional markings (such as patterns and symbols) when installing them into the corresponding positions on the printer housing, relying solely on the button's outline. During actual assembly, especially in manual operation stages, operators are prone to overlooking the subtle orientation of the markings on the button surface and installing the button at incorrect angles, such as rotating it 180 degrees. Although this misaligned installation may still appear to complete the assembly, it results in the functional markings (such as arrows and icons) on the button surface being inverted or facing the wrong direction, severely affecting the user's normal identification and operation of the functions. This constitutes an assembly defect. Therefore, we provide a button installation structure and printer to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a button mounting structure and printer.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A button mounting structure having two perpendicular directions, a second direction, and a third direction, comprising:

[0007] The mounting shell has two protrusions on its side along a first direction, and the protrusions extend along a third direction. The protrusions have mounting holes that penetrate them and the mounting shell, and the mounting holes have a center line along the first direction.

[0008] A button assembly includes a first rib and a second rib extending along a first direction, with the middle portions of the first rib and the second rib recessed close to each other along the second direction. The first rib has a first end and a second end along the first direction, and the second rib has a third end and a fourth end along the first direction. A button body is provided between the first end and the third end, and between the second end and the fourth end. The button body extends into the mounting hole. The distance between the first end and the second end is L1, the distance between the third end and the fourth end is L2, and the distances between the third end and the center line of the mounting hole, and between the fourth end and the center line of the mounting hole, are L3.

[0009] Anti-misbehaving ribs are provided on one side of each of the bosses. The distance between two anti-misbehaving ribs along the first direction is L4, and the distance from the anti-misbehaving rib to the center line of the mounting hole is L5, satisfying: L1 < L4 < L2, L5 < L3.

[0010] Preferably, each of the button bodies is provided with an abutment post along the third direction.

[0011] Preferably, the boss has a first stepped surface along the third direction, and the button body has a second stepped surface along the third direction, with the second stepped surface abutting against the first stepped surface.

[0012] Preferably, at least one fixing plate is provided between the first rib and the second rib, the fixing plate has a positioning hole that passes through it, and the mounting shell is provided with at least one first positioning post that is adapted to the positioning hole, the first positioning post being at least partially inserted through the positioning hole.

[0013] Preferably, the mounting shell is provided with a limiting post, the limiting post is located between the two bosses, and a clearance groove is formed between the first rib and the second rib, the limiting post passing through the clearance groove.

[0014] Preferably, a connecting strip is provided between the first positioning post and the boss, and between the first positioning post and the limiting post.

[0015] Preferably, the button body and the mounting hole have the same shape and can be any one of circular, elliptical, oblong, or polygonal shapes.

[0016] This application also provides a printer, the printer comprising:

[0017] The button mounting structure described in any of the above statements;

[0018] A bottom shell is detachably mounted to a mounting shell, the mounting shell has a paper tray, and the bottom shell and the mounting shell form a receiving cavity, the case structure being disposed within the receiving cavity;

[0019] A circuit board is disposed in the receiving cavity, and a push switch corresponding to the button body is provided on the circuit board;

[0020] A paper tray cover, which is rotatably mounted on the mounting housing, is used to close the paper tray.

[0021] This utility model has the following advantages:

[0022] 1. This utility model, by setting anti-misfit ribs and utilizing the dimensional relationships L1 < L4 < L2 and L5 < L3, ensures that the button assembly can only be installed into the mounting hole of the mounting shell in the correct direction during installation. When the button assembly is mistakenly rotated 180 degrees for installation, the anti-misfit ribs will block the second rib, preventing incorrect installation of the button body. This ensures that the function markings on the surface of the button body always maintain the correct orientation, avoiding user misoperation due to assembly errors, and effectively improving the accuracy and reliability of button installation.

[0023] 2. This utility model provides a contact post on the button body, which enables the contact post to accurately and reliably press the push switch on the circuit board when the button is pressed, effectively transmitting the pressing force and avoiding uneven force or poor contact problems that may occur when directly pressing the button body, thereby improving the sensitivity and stability of button triggering.

[0024] 3. By having the second step surface on the button body abut against the first step surface on the boss, this utility model effectively limits the axial movement of the button body under the action of the push-button switch rebound force, prevents the button body from protruding excessively from the mounting shell surface, ensures the flatness of the appearance after the button is reset, and improves the operating feel and the aesthetics of the product. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of the mounting shell and button assembly of this utility model in their assembled state.

[0026] Figure 2 This is a first-view structural diagram of the mounting shell, boss, first positioning post, limiting post, and connecting strip of this utility model.

[0027] Figure 3 This is a top view of the mounting shell, boss, first positioning post, limiting post and connecting strip of this utility model.

[0028] Figure 4 This is a top view of the mounting shell and button assembly of this utility model in their assembled state.

[0029] Figure 5 This is a top view of the button assembly of this utility model.

[0030] Figure 6 This is a first-view structural diagram of the button assembly of this utility model.

[0031] Figure 7 This is a second-view structural diagram of the button assembly of this utility model.

[0032] Figure 8 This is a schematic diagram of the printer of this utility model in an exploded state.

[0033] Figure 9 This is a structural diagram of the printer of this utility model in its assembled state.

[0034] In the diagram, 100 is the mounting shell; 110 is the boss; 1101 is the first stepped surface; 111 is the mounting hole; 120 is the first positioning post; 130 is the limiting post; 140 is the connecting strip; 200 is the button assembly; 210 is the first rib; 211 is the first end; 212 is the second end; 220 is the second rib; 221 is the third end; 222 is the fourth end; 201 is the clearance groove; 230 is the button body; 231 is the second stepped surface; 2310 is the abutment post; 240 is the fixing plate; 241 is the positioning hole; 300 is the foolproof rib; 400 is the bottom shell; 500 is the circuit board; 510 is the push switch; 600 is the compartment cover; Z is the first direction; Y is the second direction; Z is the third direction. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0036] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] like Figure 1 — Figure 9The example shown.

[0038] This application provides a button mounting structure with two perpendicular directions: a first direction, a second direction, and a third direction. Specifically, the structure includes a mounting shell 100, a button assembly 200, and a foolproof rib 300. The foolproof rib 300 limits the position of the button assembly 200, so that the button assembly 200 cannot be installed on the mounting shell 100 after being rotated 180 degrees, thereby allowing the markings on the button assembly 200 to face a preset direction.

[0039] Specifically, the mounting shell 100 has two protrusions 110 on its side along a first direction, and the protrusions 110 extend along a third direction. Each protrusion 110 has a mounting hole 111 that penetrates it and the mounting shell 100. The mounting hole 111 has a centerline along the first direction. The button assembly 200 includes a first rib 210 and a second rib 220 extending along the first direction. The middle portions of the first rib 210 and the second rib 220 are recessed and close to each other along the second direction. The first rib 210 has a first end 211 and a second end 212 along the first direction, and the second rib 220 has a third end 221 and a fourth end 222 along the first direction. The first end 211 and the third end 222... A button body 230 is provided between the first end 111 and the second end 212 and the fourth end 222. The button body 230 extends into the mounting hole 111. The distance between the first end 211 and the second end 212 is L1, the distance between the third end 221 and the fourth end 222 is L2, the distance between the third end 221 and the center line of the mounting hole 111 and the distance between the fourth end 222 and the center line of the mounting hole 111 is L3. Anti-fooling ribs 300 are provided on one side of each boss 110. The distance between two anti-fooling ribs 300 along the first direction is L4, and the distance between the anti-fooling ribs 300 and the center line of the mounting hole 111 is L5, satisfying: L1 < L4 < L2, L5 < L3.

[0040] Please see Figures 1 to 5 As shown, in this embodiment, there are two bosses 110, both of which are integrally formed with the mounting shell 100. Each boss 110 has a mounting hole 111 that passes through the boss 110 and the mounting shell 100. Correspondingly, there are also two button bodies 230, and the two button bodies 230 extend into the mounting holes 111 to complete the installation.

[0041] like Figure 5As shown, the button assembly 200 mainly consists of a first rib 210, a second rib 220, and two button bodies 230. The two button bodies 230 are located at the two ends of the first rib 210 and the second rib 220, respectively. In order to ensure that the pattern on the button body 230 is correctly placed, the first rib 210 and the second rib 220 are not symmetrically arranged. Specifically, along the first direction, the width of the first rib 210 is different from the width of the second rib 220, and the width of the second rib 220 is greater than the width of the first rib 210. That is, the distance between the first end 211 and the second end 212 is less than the distance between the third end 221 and the second end 212. To prevent the entire button assembly 200 from being installed even after rotating 180 degrees, two anti-foolproof ribs 300 are provided on the mounting shell 100. The distance between the two anti-foolproof ribs 300 is greater than the distance between the first end 211 and the second end 212, and the distance between the anti-foolproof ribs 300 is less than the distance between the third end 221 and the fourth end 222, that is, L1 < L4 < L2. The spacing between the two anti-foolproof ribs 300 along the first direction is sufficient to accommodate the first rib 210 but not the second rib 220, thereby preventing the installation of the entire button assembly 200 from being foolproof.

[0042] Please continue reading. Figure 5 As shown, in order to ensure that both the first rib 210 and the second rib 220 are within the anti-foolproof range between the two anti-foolproof ribs 300, the mounting hole 111 has a center line. The mounting hole 111 is symmetrically divided in two by the center line. It can be understood that since the button body 230 is installed in the mounting hole 111, the center line of the mounting hole 111 is also the center line of the button body 230. The distance between the anti-foolproof rib 300 and the center line is less than the distance between the end of the second rib 220 along the second direction and the center line, that is, the third end... The distance from 221 to the center line is equal to and less than the distance from the center line to the fourth end 222. If the entire button assembly 200 rotates 180 degrees during installation, the button body 230 cannot be installed into the mounting hole 111 due to the obstruction of the anti-foolproof rib 300. Thus, the anti-foolproof rib 300 achieves the function of preventing the button assembly 200 from being installed incorrectly, and the installation of the pattern markings on the button body 230 will not be misaligned during installation.

[0043] It is understandable that this application uses an asymmetrical design of the first rib 210 and the second rib 220, and uses the foolproof rib 300 to limit the button body 230 when it is installed in the mounting hole 111, so that the button body 230 can always maintain the correct installation orientation.

[0044] In some embodiments, each button body 230 is provided with an abutment post 2310 along a third direction.

[0045] Please see Figure 4 , Figure 5 , Figure 6 as well as Figure 7 and Figure 8 As shown, in order to trigger the push switch 510 on the circuit board 500, an abutment post 2310 needs to be provided on the side of the button body 230 facing the push switch 510, so that when the button body 230 is pressed down, it can touch the push switch 510 through the abutment post 2310, thereby pressing the push switch 510.

[0046] In some embodiments, the boss 110 is provided with a first stepped surface 1101 along a third direction, and the button body 230 is provided with a second stepped surface 231 along a third direction, the second stepped surface 231 abutting against the first stepped surface 1101.

[0047] Please see Figure 2 and Figure 6 As shown, in order to prevent the button body 230 from protruding from the surface of the mounting shell 100 due to the rebound force of the button switch 510 after the button body 230 drives the abutment post 2310 to press down, thus affecting the user experience, a first stepped surface 1101 is formed on the boss 110, and a second stepped surface 231 is formed on the button body 230. After the button body 230 is inserted into the mounting hole 111, the second stepped surface 231 abuts against the first stepped surface 1101. At this time, the button body 230 is limited by the abutting cooperation of the first stepped surface 1101 and the second stepped surface 231, preventing the button body 230 from protruding from the surface of the mounting shell 100 due to the rebound force of the button switch 510.

[0048] In some embodiments, at least one fixing plate 240 is provided between the first rib 210 and the second rib 220. The fixing plate 240 has a positioning hole 241 that passes through it. The mounting shell 100 is provided with at least one first positioning post 120 that is adapted to the positioning hole 241. The first positioning post 120 is at least partially inserted through the positioning hole 241.

[0049] See Figure 3 , Figure 5 as well as Figure 6 and Figure 7As shown, in order to facilitate installation and prevent positional shift during the installation of the button body 230 onto the boss 110, at least one first positioning post 120 is provided on the mounting shell 100. Correspondingly, a fixing plate 240 adapted to the first positioning post 120 is also connected between the first rib 210 and the second rib 220. The fixing plate 240 has a positioning hole 241 adapted to the first positioning post 120. During installation, the fixing plate 240 is fitted onto the first positioning post 120, so that the first positioning post 120 passes through the positioning hole 241, thereby achieving positioning of the entire button assembly 200.

[0050] Furthermore, if there is only one first positioning post 120, the entire button assembly 200 may rotate around the first positioning post 120 as the center, thus failing to achieve a good positioning effect. Therefore, in this embodiment, there are two first positioning posts 120 and two fixing plates 240, thereby achieving complete positioning of the entire button assembly 200.

[0051] In some embodiments, a limiting post 130 is provided on the mounting shell 100. The limiting post 130 is located between two bosses 110. A relief groove 201 is formed between the first rib 210 and the second rib 220. The limiting post 130 passes through the relief groove 201.

[0052] See Figure 3 , Figure 5 as well as Figure 6 and Figure 7 As shown, in order to facilitate positioning during installation, a limiting post 130 is set between the two first positioning posts 120. Correspondingly, a clearance groove 201 is set between the first rib 210 and the second rib 220. The limiting post 130 passes into the clearance groove 201 to achieve initial positioning of the entire button assembly 200.

[0053] In this embodiment, the clearance groove 201 is formed by the first rib 210, the second rib 220 and the two fixing plates 240 surrounding each other.

[0054] In some embodiments, a connecting strip 140 is provided between the first positioning post 120 and the boss 110, and between the first positioning post 120 and the limiting post 130.

[0055] Please continue reading. Figure 3As shown, in this embodiment, the first positioning post 120 and the limiting post 130 are integrally formed with the mounting shell 100. Since the connection area between the first positioning post 120 and the limiting post 130 and the mounting shell 100 is small, they are prone to breakage at the connection point with the mounting shell 100 when subjected to a large force. Therefore, connecting strips 140 are provided between the first positioning post 120 and the limiting post 130 and between the first positioning post 120 and the boss 110, thereby enhancing the strength of the connection between the first positioning post 120 and the limiting post 130 and the mounting shell 100 and making it less prone to breakage.

[0056] In some embodiments, the button body 230 and the mounting hole 111 have the same shape and can be any one of circular, elliptical, oblong, or polygonal. In this embodiment, the button body 230 and the mounting hole 111 are oblong.

[0057] Please see Figure 8 and Figure 9 As shown in the figure, this application embodiment also provides a printer, which includes a button mounting structure, a bottom shell 400, a circuit board 500 and a tray cover 600 as described above. The bottom shell 400 is detachably mounted on the mounting shell 100. The mounting shell 100 has a paper tray, and the bottom shell 400 and the mounting shell 100 form a receiving cavity. The button structure is disposed in the receiving cavity. The circuit board 500 is disposed in the receiving cavity. The circuit board 500 is provided with a push switch 510 corresponding to the button body 230. The tray cover 600 is rotatably disposed on the mounting shell 100 and is used to close the paper tray.

[0058] The abutment post 2310 corresponds one-to-one with the push switch 510. When the button body 230 is pressed and moved, the abutment post 2310 abuts against the push switch 510, thereby realizing the touch of the push switch 510. For example, the push switch 510 can be a tactile micro switch.

[0059] The working process of the present utility model is as follows: two bosses (110) are arranged on the side surface of the mounting housing (100) along a first direction, and a mounting hole (111) is opened on each boss (110). The key assembly (200) comprises a first rib (210) and a second rib (220), the middle parts of the first rib and the second rib are recessed towards each other along a second direction. The first rib (210) has a first end (211) and a second end (212), the second rib (220) has a third end (221) and a fourth end (222). A key body (230) is arranged between the first end (211) and the third end (221), and between the second end (212) and the fourth end (222), the key body (230) extends into the mounting hole (111). Fool-proof ribs (300) are arranged on one side of each boss (110), fool-proofing is achieved through the dimension relations L1 < L4 < L2 and L5 < L3. When the key assembly (200) is attempted to be installed in a wrong direction, the fool-proof ribs (300) will block the second rib (220), preventing the key body (230) from being installed after rotating 180 degrees, and ensuring that the mark on the key body (230) faces correctly; during installation, firstly align the avoiding groove (201) of the key assembly (200) with the limit post (130) on the mounting housing (100) for primary positioning, then sleeve the positioning hole (241) on the fixing plate (240) on the first positioning post (120) to achieve accurate positioning. Meanwhile, the second step surface (231) of the key body (230) abuts against the first step surface (1101) of the boss (110), limiting the axial movement of the key body (230); when a user presses the key body (230), the key body (230) moves along a third direction, driving the abutting post (2310) to press the press switch (510) on the circuit board (500), so as to trigger the switch. After release, the resilience of the press switch (510) resets the key body (230), and the abutment between the second step surface (231) and the first step surface (1101) prevents the key body (230) from protruding; the entire key mounting structure is located in the accommodating cavity formed by the mounting housing (100) and the bottom housing (400), the warehouse cover (600) is used to close the paper warehouse of the mounting housing (100), completing the assembly and use of the printer.

[0060] Although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications can be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features thereof. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A button mounting structure having two perpendicular directions: a first direction, a second direction, and a third direction, characterized in that, include: Mounting housing (100) has two protrusions (110) on its side along a first direction, and the protrusions (110) extend along a third direction. The protrusions (110) are provided with mounting holes (111) that penetrate them and the mounting housing (100). The mounting holes (111) have a center line along the first direction. A button assembly (200) includes a first rib (210) and a second rib (220) extending along a first direction. The middle portions of the first rib (210) and the second rib (220) are recessed towards each other along the second direction. The first rib (210) has a first end (211) and a second end (212) along the first direction. The second rib (220) has a third end (221) and a fourth end (222) along the first direction. The first end (211) and the third end (222) are recessed towards each other along the second direction. A button body (230) is provided between the first end (221) and the second end (212) and the fourth end (222). The button body (230) extends into the mounting hole (111). The distance between the first end (211) and the second end (212) is L1. The distance between the third end (221) and the fourth end (222) is L2. The distance between the third end (221) and the center line of the mounting hole (111) and the distance between the fourth end (222) and the center line of the mounting hole (111) is L3. Anti-misalignment ribs (300) are provided on one side of each of the bosses (110), the distance between two anti-misalignment ribs (300) along the first direction is L4, and the distance from the anti-misalignment rib (300) to the center line of the mounting hole (111) is L5, satisfying: L1 < L4 < L2, L5 < L3.

2. The button mounting structure according to claim 1, characterized in that: Each of the button bodies (230) is provided with an abutment post (2310) along the third direction.

3. The button mounting structure according to claim 1, characterized in that: The boss (110) is provided with a first stepped surface (1101) along the third direction, and the button body (230) is provided with a second stepped surface (231) along the third direction, and the second stepped surface (231) abuts against the first stepped surface (1101).

4. The button mounting structure according to claim 1, characterized in that: At least one fixing plate (240) is provided between the first rib (210) and the second rib (220). The fixing plate (240) has a positioning hole (241) that passes through it. The mounting shell (100) is provided with at least one first positioning post (120) that is adapted to the positioning hole (241). The first positioning post (120) is at least partially inserted through the positioning hole (241).

5. The button mounting structure according to claim 4, characterized in that: The mounting housing (100) is provided with a limiting post (130), the limiting post (130) is located between the two bosses (110), and a relief groove (201) is formed between the first rib (210) and the second rib (220), the limiting post (130) passes through the relief groove (201).

6. The button mounting structure according to claim 5, characterized in that: A connecting strip (140) is provided between the first positioning post (120) and the boss (110) as well as between the first positioning post (120) and the limiting post (130).

7. The button mounting structure according to claim 6, characterized in that: The button body (230) and the mounting hole (111) have the same shape and can be any one of the following: circular, elliptical, oblong, or polygonal.

8. A printer, characterized in that, include: The button mounting structure according to any one of claims 1 to 7; A bottom shell (400) is detachably mounted on the mounting shell (100), the mounting shell (100) has a paper tray, and the bottom shell (400) and the mounting shell (100) form a receiving cavity, and the mounting structure is disposed in the receiving cavity; A circuit board (500) is disposed in the receiving cavity, and a push switch (510) corresponding to the button body (230) is provided on the circuit board (500); A cover (600) is rotatably disposed on the mounting shell (100) and is used to close the paper tray.

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