Printer

Abstract

The utility model discloses a printer, which comprises a shell and a key assembly, and is characterized in that the shell is provided with a plurality of key holes; the key assembly comprises a plurality of keys and a bridging part connected with the keys, and the keys and the bridging part are integrally formed; wherein the key comprises a pressing part and an elastic connecting part, the pressing part is installed in the key hole, the elastic connecting part is connected between the pressing part and the bridging part, the elastic connecting part is connected with the shell, the bridging part is connected with the adjacent elastic connecting part, and the elastic connecting part has elasticity so that the key can move and reset in the first direction relative to the shell. According to the invention, the problems of complex key structure and low assembly efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of printing technology, and in particular to a printer. BACKGROUND

[0002] In the related art, a printer includes a switching component and a button for controlling the switching state of the switching component. The button structure is complex and has low assembly efficiency. CONTENT OF THE UTILITY MODEL

[0003] Embodiments of the present application provide a printer to improve the problem of complex button structure and low assembly efficiency.

[0004] Embodiments of the present application provide a printer, which includes a housing and a button assembly, the housing has a plurality of button holes; the button assembly includes a plurality of buttons and a bridge part connected with the plurality of buttons, the plurality of buttons and the bridge part are formed as one body; wherein the button includes a pressing part and an elastic connecting part, the pressing part is installed in the button hole, the elastic connecting part is connected between the pressing part and the bridge part, the elastic connecting part is connected with the housing, the bridge part is connected with the adjacent elastic connecting part, the elastic connecting part has elasticity so that the button can move and reset relative to the housing along a first direction.

[0005] In some embodiments, the elastic connecting part includes at least two elastic parts connected with the pressing part, and a mounting part connected with each of the elastic parts, the mounting part is connected with the housing.

[0006] In some embodiments, the elastic connecting part includes two elastic parts connected with the pressing part, and a mounting part connected with the two elastic parts, the mounting part is connected with the housing, and the two elastic parts are symmetrically connected to opposite sides of the pressing part.

[0007] In some embodiments, the elastic connecting part includes at least one elastic part connected with the pressing part, and a mounting part connected with the elastic part, the mounting part is connected with the housing, and a reinforcing rib is arranged between the elastic part and the pressing part.

[0008] In some embodiments, the elasticity of the bridge part is smaller than the elasticity of the elastic connecting part.

[0009] In some embodiments, the printer further includes a plurality of positioning assemblies, each of the positioning assemblies is arranged corresponding to the elastic connecting part, and the positioning assembly is connected between the corresponding elastic connecting part and the housing to limit the elastic connecting part from deviating relative to the housing along a direction intersecting the first direction.

[0010] In some embodiments, the positioning assembly comprises a first positioning post disposed on one of the housing and the elastic connecting portion; the other of the housing and the elastic connecting portion is provided with a first positioning hole adapted to be plugged with the first positioning post.

[0011] In some embodiments, the distance between the center of the first positioning post and the center of the pressing portion is 8-18 mm.

[0012] In some embodiments, a first gap is provided between the side wall of the first positioning post and the corresponding hole wall of the first positioning hole, and the size of the first gap is 0.1-0.3 mm.

[0013] In some embodiments, the positioning assembly further comprises a second positioning post disposed on one of the housing and the elastic connecting portion; the other of the housing and the elastic connecting portion is provided with a second positioning hole adapted to be plugged with the second positioning post.

[0014] In some embodiments, the distance between the second positioning post and the pressing portion is greater than the distance between the first positioning post and the pressing portion.

[0015] In some embodiments, the center of the pressing portion, the center of the first positioning post and the center of the second positioning post are collinear.

[0016] In some embodiments, a second gap is provided between the side wall of the second positioning post and the corresponding hole wall of the second positioning hole, and the size of the second gap is 0.1-0.3 mm.

[0017] In some embodiments, the pressing portion passes through the key hole from the inner side of the housing and is exposed to the outer side of the housing; a third gap is provided between the side wall of the pressing portion and the corresponding hole wall of the key hole, and the size of the third gap is 0.1-0.5 mm.

[0018] In some embodiments, the key assembly comprises a plurality of the bridge portions.

[0019] In some embodiments, the bridge portion is configured in a curved shape, a zigzag shape or a combination thereof.

[0020] In some embodiments, the bridge portion is connected to the end of the elastic connecting portion away from the pressing portion.

[0021] In some embodiments, the printer further comprises a circuit board, one of the housing and the circuit board is provided with a third positioning post, and the other is provided with a third positioning hole adapted to be plugged with the third positioning post.

[0022] In some embodiments, the distance between the third positioning column and the button is 0.3mm-1mm.

[0023] In some embodiments, the button is provided with a first mounting hole, and the circuit board is provided with a second mounting hole corresponding to the first mounting hole; the printer further comprises a fastener, which is arranged through the first mounting hole and the second mounting hole and connected with the shell.

[0024] In some embodiments, the printer further comprises a plurality of positioning assemblies, each of which corresponds to a elastic connecting part, and the positioning assembly is connected to the corresponding elastic connecting part and the shell to limit the displacement of the elastic connecting part relative to the shell in a direction intersecting the first direction; the positioning assembly comprises a first positioning column arranged on the shell, and the elastic connecting part is provided with a first positioning hole matched with the first positioning column; the first positioning hole is used as the first mounting hole.

[0025] In some embodiments, the shell is provided with a clamping piece, and the circuit board is clamped between the clamping piece and the shell, and the clamping piece is used to limit the movement of the circuit board in the first direction, and the third positioning column is used to limit the movement of the circuit board in a direction intersecting the first direction.

[0026] In some embodiments, the printer further comprises a sensor element; the button assembly presses the sensor element against the shell to limit the sensor element.

[0027] The printer of the embodiments of the present application connects the pressing part and the shell through the elastic connecting part, uses the elasticity of the elastic connecting part, so that the button composed of the elastic connecting part and the pressing part can move and reset relative to the shell in the first direction, and realizes the pressing and resetting functions of the button. On this basis, the bridge part is arranged to connect a plurality of buttons, so that the plurality of buttons can be limited relative to each other, and the button misalignment prevention effect is achieved. Further, the plurality of buttons and the bridge part are integrally formed, which simplifies the structure, reduces the number of parts, and improves the assembly convenience and efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0029] Figure 1A structural diagram of a printer according to one embodiment of this application is shown.

[0030] Figure 2 A structural diagram of the printer from another perspective is shown in one embodiment of this application.

[0031] Figure 3 It shows Figure 2 An exploded view of the printer.

[0032] Figure 4 A structural diagram of a button assembly according to an embodiment of this application is shown.

[0033] Figure 5 It shows Figure 1 A cross-sectional view of the printer.

[0034] Figure 6 It shows Figure 5 A magnified view of a portion of point A in the middle.

[0035] Figure 7 A structural diagram of the upper shell in one embodiment of this application is shown.

[0036] Figure 8 The diagram shows the structure of the upper shell, button assembly, and circuit board in one embodiment of this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Printer;

[0039] 10. Housing; 10a. Lower housing; 10b. Upper housing; 11. Button hole; 12. Snap-fit ​​component;

[0040] 20. Button assembly; 21. Button; 211. Pressing part; 2111. Reinforcing rib; 212. Elastic connection part; 2121. Elastic part; 2122. Mounting part; 22. Bridging part;

[0041] 31. First positioning post; 32. First positioning hole; 321. First mounting hole; 33. Second positioning post; 34. Second positioning hole;

[0042] 40. Circuit board; 41. Third positioning post; 42. Third positioning hole; 43. Second mounting hole;

[0043] 50. Sensor components;

[0044] X, the first direction. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0046] The following description refers to the accompanying drawings. Unless otherwise indicated, same or similar elements in different drawings are denoted with the same or similar reference numerals. The embodiments described in the following examples do not represent all embodiments consistent with the application. Instead, they are merely examples of apparatuses and methods consistent with some aspects of the present application as detailed in the appended claims.

[0047] In the related art, a printer includes a switching component and a key for controlling the switching state of the switching component. In use, there are cases where the key is mispositioned and the switching state cannot be accurately controlled, resulting in reduced user experience.

[0048] In order to improve the user experience, in some other related art, a limiting structure is provided to limit the key, preventing the key from being mispositioned. This results in a complex overall structure of the key and low assembly efficiency.

[0049] To solve the above problems, the present application provides a printer, which includes a housing and a key assembly. The key assembly includes a plurality of keys and a bridge portion connected with the keys. The key includes a pressing portion and an elastic connecting portion. The pressing portion is connected with the housing through the elastic connecting portion. The elasticity of the elastic connecting portion allows the key composed of the elastic connecting portion and the pressing portion to move in a first direction relative to the housing and reset, realizing the pressing and resetting functions of the key. On this basis, the bridge portion is provided to connect the plurality of keys, allowing the plurality of keys to limit each other, achieving the anti-misposition effect of the keys. Further, the plurality of keys and the bridge portion are integrally formed, simplifying the structure, reducing the number of parts, and improving the assembly convenience and efficiency.

[0050] Referring to Figure 1 and Figure 2 , the present application provides a printer 1, which includes a housing 10 and a key assembly 20.

[0051] Further in combination with Figure 3 and Figure 4 , the key assembly 20 includes a plurality of keys 21 and a bridge portion 22 connected with the plurality of keys 21. The key 21 includes a pressing portion 211 and an elastic connecting portion 212.

[0052] The shape, size and material of the housing 10 are not limited and can be adjusted according to design requirements. The housing 10 is provided with a plurality of key holes 11, for example, 2, 3 or more key holes 11.

[0053] The plurality of keys 21 are, for example, 2, 3 or more keys 21. The number of keys 21 is equal to the number of key holes 11, and the plurality of keys 21 are arranged one-to-one with the plurality of key holes 11. Alternatively, the number of keys 21 is greater than the number of key holes 11, and at least a portion of the key holes 11 correspond to a plurality of keys 21.

[0054] The number of the bridge portions 22 is one or more. When the number of the bridge portions 22 is one, one bridge portion 22 is connected with each of the keys 21. When the number of the bridge portions 22 is more than one, each of the bridge portions 22 is connected with all of the keys 21, or one bridge portion 22 is connected with part of the keys 21 and the other bridge portions 22 are connected with the rest of the keys 21.

[0055] The shape of the pressing portion 211 is circular, elliptical, triangular, quadrangular, pentagonal, hexagonal or a combination thereof, which can be selected according to design requirements and is not limited herein. The pressing portion 211 is installed in the key hole 11, and the shape of the pressing portion 211 is matched with the shape of the key hole 11, for example.

[0056] Continuing to refer to Figure 3 and Figure 4 , the elastic connecting portion 212 is connected between the pressing portion 211 and the bridge portion 22, and the elastic connecting portion 212 is connected with the shell 10. Further combining Figure 5 and Figure 6 , the elastic connecting portion 212 is elastic so that the key 21 can move along the first direction X relative to the shell 10 and reset, thereby realizing the pressing and resetting functions of the key 21. Among them, the adjacent elastic connecting portions 212 are connected through the bridge portion 22, so that the plurality of keys 21 can limit each other, achieving the anti-dislocation effect of the keys 21.

[0057] Further, the plurality of keys 21 and the bridge portion 22 are formed integrally. In this way, the structure is simplified, the number of parts is reduced, and the assembly convenience and efficiency are improved.

[0058] Optionally, the printer 1 further comprises a switch component, and the key 21 is arranged correspondingly with the switch component. Pressing the pressing portion 211 along the first direction X can drive the pressing portion 211 to press the switch component, thereby realizing the adjustment of the on-off state of the switch component.

[0059] Referring to Figure 1 and Figure 3 , optionally, the shell 10 comprises a lower shell 10a and an upper shell 10b, and the upper shell 10b can cover the lower shell 10a to form a containing space for containing the functional components of the printer 1. The key hole 11 is arranged on the upper shell 10b, and one end surface of the pressing portion 211 is exposed through the key hole 11, thereby facilitating the user to press the pressing portion 211 of the key 21 from the front of the printer 1 when using.

[0060] Referring to Figure 3 and Figure 4In some embodiments, the elastic connecting portion 212 comprises an elastic portion 2121 and a mounting portion 2122, the elastic portion 2121 is connected with the pressing portion 211, and the mounting portion 2122 is connected with the elastic portion 2121 and the shell 10. In this way, the elastic portion 2121 can provide elasticity, so that the movement and reset of the pressing portion 211 are more sensitive. The mounting portion 2122 connects the elastic portion 2121 to the shell 10, preventing the elastic connecting portion 212 from being misaligned.

[0061] Optionally, the material of the elastic portion 2121 and the material of the mounting portion 2122 are plastic, for example, and the elastic portion 2121 and the mounting portion 2122 can be integrally formed, thereby simplifying the structure of the elastic connecting portion 212.

[0062] Optionally, the elastic portion 2121 and the mounting portion 2122 are designed to have different shapes, for example, so that the elastic portion 2121 and the mounting portion 2122 respectively have greater elasticity and greater rigidity. For example, the elastic portion 2121 is designed to be a narrower and longer strip than the mounting portion 2122.

[0063] Optionally, the elastic connecting portion 212 comprises at least two elastic portions 2121, for example, two, three, or more elastic portions 2121, each of which is connected with the pressing portion 211 and each of which is connected with the mounting portion 2122. In this way, the plurality of elastic portions 2121 can provide a more stable elastic force, so that the key 21 moves more smoothly.

[0064] Optionally, the elastic connecting portion 212 comprises two elastic portions 2121, both of which are connected with the pressing portion 211 and both of which are connected with the mounting portion 2122, and the two elastic portions 2121 are symmetrically connected to opposite sides of the pressing portion 211. In this way, the stability of the key 21 can be further improved.

[0065] Optionally, the elastic connecting portion 212 comprises at least one elastic portion 2121, for example, one, two, or more elastic portions 2121, and a reinforcing rib 2111 is arranged between the elastic portion 2121 and the pressing portion 211. In this way, the stability of the connection between the elastic portion 2121 and the pressing portion 211 can be improved, and the risk of the elastic portion 2121 breaking can be reduced.

[0066] In some embodiments, the elasticity of the bridge portion 22 is less than the elasticity of the elastic connecting portion 212. For example, the elasticity of the bridge portion 22 is less than the elasticity of the connecting portion by virtue of a difference in material, which is not limited in the present embodiment. For another example, the elasticity of the bridge portion 22 is less than the elasticity of the connecting portion by virtue of a difference in shape or size. In this way, the elastic connecting portion 212 can provide a greater elastic force to ensure the flexibility of the key 21. Meanwhile, the bridge portion 22 is less likely to elastically deform, thereby better providing a mutual limiting force between the plurality of keys 21 to achieve a better anti-dislocation effect of the keys 21.

[0067] In some embodiments, the printer 1 further comprises a plurality of positioning assemblies, each of which is arranged corresponding to an elastic connecting portion 212 and connected to the corresponding elastic connecting portion 212 and the housing 10 to limit the displacement of the elastic connecting portion 212 relative to the housing 10 in a direction intersecting the first direction X. Based on this, by arranging the positioning assembly between the housing 10 and the key assembly 20 and limiting the displacement of the key assembly 20 in a direction other than the pressing direction by the positioning assembly, the key assembly 20 can smoothly realize the pressing and resetting functions while reducing the risk of dislocation of the key assembly 20, thereby improving the user experience.

[0068] Referring to Figure 4 and Figure 7 In some embodiments, the positioning assembly comprises a first positioning column 31 arranged in one of the housing 10 and the elastic connecting portion 212. For example, the first positioning column 31 has a cylindrical shape, a triangular prism shape, a quadrangular prism shape or other shapes. The other one of the housing 10 and the elastic connecting portion 212 is provided with a first positioning hole 32 adapted to be inserted into the first positioning column 31. In this way, the positioning of the elastic connecting portion 212 is realized by the cooperation of the positioning column and the positioning hole, which is simple in structure and convenient to assemble.

[0069] In some embodiments, the distance between the center of the first positioning column 31 and the center of the pressing portion 211 is 8-18 mm, for example, 9 mm, 10 mm or 15 mm. It can be understood that when the distance between the center of the first positioning column 31 and the center of the pressing portion 211 is too large, the pressing portion 211 is prone to dislocation during pressing; when the distance between the center of the first positioning column 31 and the center of the pressing portion 211 is too small, the pressing of the pressing portion 211 is greatly limited and the pressing is not smooth. Based on this, the present embodiment sets a moderate distance to ensure good limiting effect and smooth pressing.

[0070] In some embodiments, a first gap is provided between the sidewall of the first positioning column 31 and the corresponding hole wall of the first positioning hole 32, and the size of the first gap is 0.1mm-0.3mm, for example, the size of the first gap is 0.15mm, 0.2mm or 0.25mm. When the size of the first gap is larger, the coupling of the first positioning column 31 and the first positioning hole 32 is more convenient. However, the increase of the size of the first gap will increase the risk of mispositioning of the key 21. Therefore, the size of the first gap is set to 0.1mm-0.3mm in the embodiment, which not only guarantees the good mispositioning prevention effect, but also guarantees the assembly convenience.

[0071] Referring back to Figure 4 and Figure 7 In some embodiments, the positioning assembly further comprises a second positioning column 33 provided in one of the housing 10 and the elastic connecting part 212. The shape of the second positioning column 33 is the same as or different from that of the first positioning column 31, and the size of the second positioning column 33 is the same as or different from that of the first positioning column 31. The other one of the housing 10 and the elastic connecting part 212 is provided with a second positioning hole 34 which is adapted to be inserted with the second positioning column 33. In this way, the multiple positioning structures can be used for synchronous positioning and limiting, and the limiting effect is further improved.

[0072] In some embodiments, the positioning assembly comprises multiple positioning columns, and the spacing between the multiple positioning columns and the pressing part 211 is different. For example, the positioning assembly comprises the first positioning column 31 and the second positioning column 33, and the spacing between the second positioning column 33 and the pressing part 211 is greater than the spacing between the first positioning column 31 and the pressing part 211. In this way, the limiting can be performed at different distances respectively, and the limiting effect is improved.

[0073] In some embodiments, the center of the pressing part 211, the center of the first positioning column 31 and the center of the second positioning column 33 are collinear. In this way, the mispositioning of the key 21 can be more effectively prevented.

[0074] Alternatively, the spacing between the center of the pressing part 211 and the center of the first positioning column 31 is equal to the spacing between the center of the first positioning column 31 and the center of the second positioning column 33, or the spacing between the center of the pressing part 211 and the center of the first positioning column 31 is greater than the spacing between the center of the first positioning column 31 and the center of the second positioning column 33.

[0075] In some embodiments, a second gap is provided between the sidewall of the second positioning column 33 and the corresponding hole wall of the second positioning hole 34, and the size of the second gap is 0.1mm-0.3mm. In this way, the mispositioning prevention effect is guaranteed, and the assembly convenience is also guaranteed.

[0076] Referring to Figure 1 , Figure 5 andFigure 6 In some embodiments, the pressing portion 211 passes through the key hole 11 from the inner side of the shell 10 and is exposed to the outer side of the shell 10. A third gap is provided between the side wall of the pressing portion 211 and the corresponding hole wall of the key hole 11, and the size of the third gap is 0.1mm-0.5mm, for example, 0.2mm, 0.3mm or 0.4mm. When the size of the third gap is small, it can better prevent dust and other sundries from entering the shell 10 to damage the internal components of the printer 1. However, reducing the size of the third gap can easily cause friction between the pressing portion 211 and the hole wall of the key hole 11 during pressing, affecting the smoothness of pressing. Therefore, the size of the third gap is set to 0.1mm-0.5mm in this embodiment, which not only guarantees the smoothness of pressing, but also has good dustproof effect.

[0077] Referring to Figure 4 In some embodiments, the key assembly 20 includes a plurality of bridge portions 22. For example, the printer 1 includes two, three, four or more bridge portions 22. The plurality of bridge portions 22 are the same or different in shape. The plurality of bridge portions 22 are the same or different in size. The plurality of bridge portions 22 are the same or different in material, for example, all are plastic. Therefore, the plurality of keys 21 can be more effectively limited by each other, achieving the key 21 anti-dislocation effect.

[0078] Optionally, the key assembly 20 includes two bridge portions 22, and the two ends of the bridge portion 22 are connected to one key 21 respectively. In this way, the two bridge portions 22 limit the two keys 21 synchronously, which has better limiting effect and simple structure.

[0079] In some embodiments, the bridge portion 22 is configured in a curved shape, a polyline or a combination thereof. For example, the bridge portion 22 is configured in a wave shape or a zigzag shape, so that the bridge portion 22 has a certain buffering effect.

[0080] In some embodiments, the bridge portion 22 is connected to the end of the elastic connecting portion 212 away from the pressing portion 211. It can be understood that when the bridge portion 22 is connected to the end of the elastic connecting portion 212 close to the pressing portion 211, it will greatly limit the pressing function of the pressing portion 211. In this embodiment, the bridge portion 22 is connected to the end of the elastic connecting portion 212 away from the pressing portion 211, for example, the elastic connecting portion 212 is divided into three sections, which are the first section close to the pressing portion 211, the second section away from the pressing portion 211, and the third section between the first section and the second section, and the bridge portion 22 is connected to the second section, so as to guarantee the flexibility of the pressing function of the pressing portion 211.

[0081] Referring to Figure 5- Figure 8In some embodiments, the printer 1 further comprises a circuit board 40, one of the housing 10 and the circuit board 40 is provided with a third positioning post 41, and the other is provided with a third positioning hole 42 which is adapted to be plugged with the third positioning post 41. Exemplarily, a plurality of switch components are arranged on the circuit board 40, each of which corresponds to a key 21, and when the pressing portion 211 is pressed, the pressing portion 211 can press the switch component, thereby realizing the regulation of the switch state of the switch component. Based on this, through the cooperation of the third positioning post 41 and the third positioning hole 42, the pre-positioning of the circuit board 40 can be realized, thereby improving the assembly efficiency.

[0082] In some embodiments, the distance between the third positioning post 41 and the key 21 is 0.3-1mm, for example, the distance between the third positioning post 41 and the elastic connecting portion 212 is 0.3-1mm. Exemplarily, the distance between the third positioning post 41 and the key 21 is 0.4mm, 0.5mm or 0.8mm. Based on this, the smaller distance between the third positioning post 41 and the elastic connecting portion 212 enables the third positioning post 41 to limit the elastic connecting portion 212, thereby further limiting the pressing portion 211, and further improving the anti-misplacement effect.

[0083] In combination with the above Figure 4 In some embodiments, the key 21 is provided with a first mounting hole 321, for example, the elastic connecting portion 212 is provided with the first mounting hole 321, for example, the mounting portion 2122 is provided with the first mounting hole 321. The circuit board 40 is provided with a second mounting hole 43 corresponding to the first mounting hole 321. The printer 1 further comprises a fastener, the fastener is arranged in the first mounting hole 321 and the second mounting hole 43, and is connected with the housing 10. Based on this, by arranging the first mounting hole 321 on the key 21 as a positioning reference for the installation of the circuit board 40, the installation structure of the circuit board 40 is simplified. Moreover, through the cooperation of the first mounting hole 321 and the second mounting hole 43, the positioning accuracy of the circuit board 40 is improved. Furthermore, the installation area of the circuit board 40 and the installation area of the key 21 are partially overlapped, thereby saving space and reducing the volume of the printer 1.

[0084] In some embodiments, the printer 1 further comprises a plurality of positioning assemblies, each corresponding to one of the elastic connecting portions 212, and each of the positioning assemblies is connected to the corresponding elastic connecting portion 212 and the housing 10 to limit the displacement of the elastic connecting portion 212 relative to the housing 10 in a direction intersecting the first direction X. The positioning assembly comprises a first positioning post 31 provided on the housing 10, and the elastic connecting portion 212 is provided with a first positioning hole 32 which is adapted to be inserted into the first positioning post 31, and the first positioning hole 32 is used as a first mounting hole 321. In this way, the first positioning hole 32 of the elastic connecting portion 212 is fully utilized, and the first positioning hole 32 has the functions of positioning the key 21 and positioning the circuit board 40, thereby further simplifying the mounting structure of the circuit board 40.

[0085] Optionally, the first mounting hole 321 is configured as a threaded hole, and the fastener is a screw or a bolt, thereby improving the mounting stability of the circuit board 40.

[0086] Referring to Figure 7 and Figure 8 In some embodiments, the housing 10 is provided with a clamping member 12, and the circuit board 40 is clamped between the clamping member 12 and the housing 10. The clamping member 12 is used to limit the movement of the circuit board 40 in the first direction X, and the third positioning post 41 is used to limit the movement of the circuit board 40 in a direction intersecting the first direction X. For example, the clamping member 12 comprises a connecting segment and a limiting segment connected to each other. One end of the connecting segment is fixed to the housing 10, and the other end extends away from the housing 10. The limiting segment is connected to the end of the connecting segment away from the housing 10, and the connecting segment and the limiting segment combine with the housing 10 to form a C-shaped clamping space. The circuit board 40 enters the clamping space through the C-shaped opening. In this way, during the installation of the circuit board 40, the circuit board 40 can be clamped into the clamping space defined by the clamping member 12 and the housing 10, and the circuit board 40 is further positioned by the third positioning post 41, thereby achieving simple pre-installation of the circuit board 40, simple structure and convenient operation.

[0087] Optionally, the clamping member 12 and the third positioning post 41 are respectively located on opposite sides of the circuit board 40, thereby making the positioning more accurate, and the circuit board 40 is not easy to be displaced after positioning.

[0088] Continuing to refer to Figure 7 and Figure 8 In some embodiments, the printer 1 further comprises a sensor element 50, such as an optical sensor, for example, specifically a sensor for sensing the paper ejection state. The key assembly 20 presses the sensor element 50 against the housing 10 to limit the sensor element 50. In this way, no other positioning components need to be designed to position the sensor element 50, thereby simplifying the installation and positioning structure of the sensor element 50 and reducing the volume of the printer 1.

[0089] In the description of the present application, it needs to be understood that the terms "first", "second" and the like are only used for the purpose of description and cannot be understood as indicating or implying relative importance. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise stated, "a plurality of" means at least two, for example, two, three, four, and the like. The association relationship of the associated objects is described, which means that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist together, and B exists alone. The character " / " generally represents a "or" relationship between the associated objects before and after.

[0090] The above disclosure is only the preferred embodiment of the present application, which cannot limit the scope of the right of the present application, so the equivalent changes made according to the claims of the present application still belong to the scope covered by the present application.

Claims

1. A printer characterized by comprising: The printer comprises: a shell having a plurality of key holes; a key assembly comprising a plurality of keys and a bridge connected with the plurality of keys, the plurality of keys and the bridge being formed integrally; wherein the key comprises a pressing portion and an elastic connecting portion, the pressing portion is installed in the key hole, the elastic connecting portion is connected between the pressing portion and the bridge, the elastic connecting portion is connected with the shell, the bridge is connected with the adjacent elastic connecting portion, the elastic connecting portion has elasticity so that the key can move and reset relative to the shell in a first direction.

2. The printer of claim 1, wherein, The elastic connecting portion comprises at least two elastic portions connected with the pressing portion, and a mounting portion connected with each of the elastic portions, the mounting portion is connected with the shell.

3. The printer of claim 1, wherein, The elastic connecting portion comprises two elastic portions connected with the pressing portion, and a mounting portion connected with the two elastic portions, the mounting portion is connected with the shell, and the two elastic portions are symmetrically connected to opposite sides of the pressing portion.

4. The printer of claim 1, wherein, The elastic connecting portion comprises at least one elastic portion connected with the pressing portion, and a mounting portion connected with the elastic portion, the mounting portion is connected with the shell, and a reinforcing rib is arranged between the elastic portion and the pressing portion.

5. The printer of claim 1, wherein, The elasticity of the bridge is smaller than that of the elastic connecting portion.

6. The printer of claim 1, wherein, The printer further comprises a plurality of positioning assemblies, each of the positioning assemblies corresponds to a setting of the elastic connecting portion, and the positioning assembly is connected to the corresponding elastic connecting portion and the shell to limit the elastic connecting portion from deviating relative to the shell in a direction intersecting the first direction.

7. The printer of claim 6, wherein, The positioning assembly comprises a first positioning column arranged in one of the shell and the elastic connecting portion; the other of the shell and the elastic connecting portion is provided with a first positioning hole matched with the first positioning column.

8. The printer of claim 7, wherein, The distance between the center of the first positioning column and the center of the pressing portion is 8-18 mm.

9. The printer of claim 7, wherein, A first gap is arranged between the side wall of the first positioning column and the corresponding hole wall of the first positioning hole, and the size of the first gap is 0.1-0.3 mm.

10. The printer of claim 7, wherein, The positioning assembly further comprises a second positioning column arranged in one of the shell and the elastic connecting portion; the other of the shell and the elastic connecting portion is provided with a second positioning hole matched with the second positioning column.

11. The printer of claim 10, wherein, The distance between the second positioning column and the pressing portion is greater than the distance between the first positioning column and the pressing portion.

12. The printer of claim 10, wherein, The center of the pressing portion, the center of the first positioning column and the center of the second positioning column are collinear.

13. The printer of claim 10, wherein, A second gap is arranged between the side wall of the second positioning column and the corresponding hole wall of the second positioning hole, and the size of the second gap is 0.1-0.3 mm.

14. The printer of claim 1, wherein, The pressing portion passes through the key hole from the inside of the shell and is exposed to the outside of the shell; a third gap is arranged between the side wall of the pressing portion and the corresponding hole wall of the key hole, and the size of the third gap is 0.1-0.5 mm.

15. The printer of claim 1, wherein, The key assembly comprises a plurality of bridges.

16. The printer of claim 15, wherein, The bridge portion is configured in a curved shape, a zigzag shape, or a combination thereof.

17. The printer of claim 15, wherein, The bridge portion is connected to one end of the elastic connecting portion away from the pressing portion.

18. The printer of claim 1, wherein, The printer further comprises a circuit board, one of the housing and the circuit board is provided with a third positioning post, and the other is provided with a third positioning hole matched with the third positioning post.

19. The printer of claim 18, wherein, The distance between the third positioning post and the key is 0.3mm-1mm.

20. The printer of claim 18, wherein, The key is provided with a first mounting hole, and the circuit board is provided with a second mounting hole matched with the first mounting hole. The printer further comprises a fastener, the fastener is arranged in the first mounting hole and the second mounting hole, and is connected with the housing.

21. The printer of claim 20, wherein, The printer further comprises a plurality of positioning assemblies, each of the positioning assemblies is arranged corresponding to one of the elastic connecting portions, and the positioning assembly is connected to the corresponding elastic connecting portion and the housing to limit the elastic connecting portion from deviating relative to the housing along a direction intersecting the first direction. The positioning assembly comprises a first positioning post arranged on the housing, and the elastic connecting portion is provided with a first positioning hole matched with the first positioning post. The first positioning hole is used as the first mounting hole.

22. The printer of claim 18, wherein, The housing is provided with a clamping member, the circuit board is clamped between the clamping member and the housing, and the clamping member is used to limit the movement of the circuit board along the first direction, and the third positioning post is used to limit the movement of the circuit board along a direction intersecting the first direction.

23. The printer of claim 1, wherein, The printer further comprises a sensor element. The key assembly presses the sensor element against the housing to limit the sensor element.

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