A frequency converter keyboard

Abstract

The utility model discloses a frequency converter keyboard, including panel shell, pasting film, silica gel key and key circuit board, is equipped with the mounting groove on the front of panel shell, silica gel key and key circuit board are arranged in mounting groove from outside to inside in proper order, pasting film covers mounting groove, silica gel key and panel shell, is equipped with the back glue in the area of pasting film back and silica gel key front and panel shell front abutment. The utility model discloses technical scheme adopts the scheme that pasting film and silica gel key are combined, and the keyboard body is assembled to form, thereby through pasting film, the waterproof performance and dustproof performance of frequency converter keyboard have been improved, and through silica gel key, soft pressing feeling and clear rebound feedback are provided, thereby the excellent touch experience and service life are taken into account.

Description

Technical Field

[0001] This utility model relates to the field of keyboards, and in particular to a frequency converter keyboard. Background Technology

[0002] A frequency converter is a power control device that controls an AC motor by changing the frequency of the power supply. It dynamically adjusts power supply parameters according to the actual needs of the motor, achieving its core functions of energy-saving speed regulation. To improve equipment reliability and maintenance efficiency, modern frequency converters are generally equipped with a human-machine interface keyboard, facilitating on-site parameter adjustments, status monitoring, and emergency control by operators.

[0003] Currently, there are two main design schemes for inverter keypads: one is to use membrane-type keys, where a functional film with adhesive backing is directly pasted onto a metal or engineering plastic panel, using the pre-formed raised structure of the film to provide basic tactile feedback; the other is to use silicone keys, where an elastic silicone body is fixed to the panel openings using an inside-out assembly method, relying on the deformation and rebound of the silicone material to achieve the pressing feel. However, the membrane-type scheme is limited by the material properties of the film's raised height, resulting in a short pressing stroke and a stiff feel; while the silicone solution, although offering a superior tactile experience, has physical gaps at the interface between the keypad and the panel that can easily become channels for dust intrusion, potentially causing internal circuit contamination with long-term use and affecting the product's lifespan.

[0004] Therefore, we propose a reasonably designed, easy-to-assemble, waterproof and dustproof inverter keyboard. Utility Model Content

[0005] The main purpose of this utility model is to propose a frequency converter keyboard, which aims to solve the technical problems in existing frequency converter keyboards, such as the short pressing stroke and stiff touch of the film-type keys, and the fact that the physical gaps of the silicone keys can easily become channels for dust intrusion, causing internal circuit contamination and affecting the product's service life.

[0006] To achieve the above objectives, the present invention proposes a frequency converter keyboard, which includes a panel housing; it also includes a film, silicone buttons, and a button circuit board. The front of the panel housing is provided with a mounting groove, and the silicone buttons and the button circuit board are arranged sequentially from the outside to the inside in the mounting groove. The film covers the mounting groove, the silicone buttons, and the panel housing, and the area on the back of the film that abuts against the front of the silicone buttons and the front of the panel housing is provided with adhesive.

[0007] Optionally, the front of the button circuit board abuts against the back of the silicone button, the back of the button circuit board abuts against the bottom surface of the mounting groove, and adhesive is provided on the front and back of the button circuit board and the back of the silicone button.

[0008] Optionally, the silicone button includes multiple button bodies, the film has button through holes, and the button body passes through the button through holes.

[0009] Optionally, it also includes a circuit board assembly disposed within the panel housing, wherein the button circuit board is electrically connected to the circuit board assembly;

[0010] The circuit board assembly includes a display screen, and the panel housing, button circuit board, and silicone buttons are all provided with display windows.

[0011] Optionally, the panel housing includes a front housing and a rear housing, the front housing is provided with a female buckle, and the rear housing is provided with a male buckle, the female buckle and the male buckle engaging.

[0012] Optionally, the rear housing is provided with a limiting post, and the circuit board assembly is provided with a limiting hole, through which the limiting post passes.

[0013] Optionally, it also includes a cable, the mounting groove being disposed on the front side of the front housing, and the mounting groove having a cable outlet hole;

[0014] The button circuit board is provided with a bus terminal, which is located on the back of the button circuit board. The cable passes through the outlet hole and is electrically connected to the bus terminal and the circuit board assembly respectively.

[0015] Optionally, the button circuit board is further provided with multiple button springs, the button springs are disposed on the front side of the button springs, and the bus terminal is the electrical junction point of the multiple button springs.

[0016] Optionally, the circuit board assembly further includes a lamp post, and the panel housing, button circuit board, and silicone buttons are all provided with lamp holes.

[0017] The technical solution of this utility model has the following beneficial effects:

[0018] 1. The keyboard body is assembled by combining a film and silicone keys. The film improves the waterproof and dustproof performance of the inverter keyboard, while the silicone keys provide a soft pressing feel and clear rebound feedback, thus balancing excellent tactile experience and service life.

[0019] 2. Adhesive backing is applied to the front and back of the button circuit board, as well as the back of the silicone buttons. This prevents gaps from forming between the silicone buttons, the mounting slots, and the button circuit board, thereby further preventing moisture and dust from entering and contaminating the button circuit board and circuit board components.

[0020] 3. During production, the film, silicone buttons, and button circuit board adopt an external structure. After the three are glued together, they are installed as a whole on the front of the panel housing. Therefore, they do not need to be installed inside the panel housing, which simplifies the installation process of the inverter keyboard, improves installation efficiency, reduces installation costs, and makes the overall appearance cleaner and more beautiful. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of a frequency converter keyboard according to the present invention;

[0023] Figure 2 This is an exploded view of the keyboard for a frequency converter according to the present invention.

[0024] The following are the diagram numbers: 1. Film, 2. Silicone button, 3. Button circuit board, 3. Button spring, 31. Bus terminal, 32. Front shell, 4. Female buckle, 41. Display window, 42. Lamp hole, 43. Cable outlet hole, 44. Circuit board assembly, 5. Lamp post, 51. Rear shell, 6. Limiting post, 61. Male buckle, 62. Keyboard body, 7.

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] This utility model proposes a frequency converter keyboard.

[0030] like Figures 1 to 2 As shown in Embodiment 1 of this utility model, the inverter keyboard includes a panel housing, a circuit board assembly 5, cables, a film 1, silicone keys 2, and a key circuit board 3. These components are assembled to form the keyboard body 7, which is then mounted on the inverter. In this embodiment, a mounting groove is provided on the front of the panel housing. The silicone keys 2 and the key circuit board 3 are sequentially arranged in the mounting groove from the outside to the inside. The film 1 covers the mounting groove, the silicone keys 2, and the panel housing. Adhesive is provided on the back of the film 1 in the area where it abuts against the front of the silicone keys 2 and the front of the panel housing. The film 1 adheres to the front of the silicone keys 2 and the front of the panel housing, preventing dust and moisture from entering the panel housing through the physical gaps between the silicone keys 2 and the mounting groove, thus avoiding dust and moisture contamination of the internal circuitry and affecting the product's lifespan. This utility model uses a combination of the film 1 and the silicone keys 2 to assemble the keyboard body 7. The film 1 improves the inverter keyboard's waterproof and dustproof performance, while the silicone keys 2 provide a soft pressing feel and clear rebound feedback, balancing excellent tactile experience with long service life.

[0031] Specifically, the front of the aforementioned button circuit board 3 abuts against the back of the silicone button 2, and the back of the button circuit board 3 abuts against the bottom of the mounting groove. Adhesive backing is provided on both the front and back of the button circuit board 3, as well as the back of the silicone button 2, meaning the bottom of the mounting groove, the button circuit board 3, and the back of the silicone button 2 are sequentially bonded together. This design avoids gaps between the silicone button 2, the mounting groove, and the button circuit board 3, thereby further preventing moisture and dust from intruding and contaminating the button circuit board 3 and the circuit board assembly 5. Furthermore, the silicone button 2 includes multiple button bodies, and a button through-hole is provided on the film 1, through which the button body passes.

[0032] In this embodiment, the circuit board assembly 5 is disposed inside the panel housing, and the button circuit board 3 is electrically connected to the circuit board assembly 5 via a cable. Specifically, the circuit board assembly 5 includes a display screen and a light post 51. Display windows 42 and light holes 43 are provided on the panel housing, the button circuit board 3, and the silicone buttons 2. In use, the operator inputs control information to the circuit board assembly 5 through the silicone buttons 2 and the button circuit board 3. The circuit board assembly 5 then performs operations such as parameter adjustment, status monitoring, and emergency control according to the control information. At the same time, the circuit board assembly 5 also displays corresponding content through the display screen and the light post 51. For example, the light post 51 displays the current status of the frequency converter, and the display screen displays some parameters, status, and other information, thereby assisting the operator in successfully completing the corresponding control operations.

[0033] Specifically, the aforementioned panel housing includes a front housing 4 and a rear housing 6. A female snap fastener 41 is provided on the front housing 4, and a male snap fastener 62 is provided on the rear housing 6. The front housing 4 and the rear housing 6 are assembled by snapping together using the female snap fastener 41 and the male snap fastener 62 to form the panel housing. The circuit board assembly 5 is then installed between the front housing 4 and the rear housing 6. Furthermore, a limiting post 61 is provided on the rear housing 6, and a limiting hole is provided on the circuit board assembly 5. When the circuit board assembly 5 is installed inside the panel housing, the limiting post 61 passes through the limiting hole, thereby limiting the position of the circuit board assembly 5 within the panel housing and preventing the circuit board assembly 5, the display screen, and the lamp post 51 from shifting relative to the display window 42 and the lamp hole 43 due to various reasons.

[0034] In this embodiment, the aforementioned mounting groove is located on the front of the front housing 4, and a cable outlet hole 44 is provided within the mounting groove. The button circuit board 3 is provided with a bus terminal 32 and multiple button springs 31. The bus terminal 32 is located on the back of the button circuit board 3, and cables pass through the cable outlet hole 44 to electrically connect to the bus terminal 32 and the circuit board assembly 5, respectively. Additionally, the button springs 31 are located on the front of the button springs 31, and their number and position distribution correspond one-to-one with the number and position distribution of the silicone buttons 2. The bus terminal 32 serves as the electrical convergence point for the multiple button springs 31, aggregating the signals generated by the button springs 31. In use, the button springs 31 act as mechanical switch contacts, closing the circuit and generating an electrical signal when pressed by the operator. The bus terminal 32, acting as the electrical convergence point, connects to all the button springs 31 via PCB copper foil, aggregating the signals and transmitting them to the circuit board assembly 5 via cables.

[0035] It is worth noting that during production, the film 1, silicone button 2, and button circuit board 3 of this utility model adopt an external mounting structure. After being bonded together, they are integrally installed on the front of the panel housing, eliminating the need for installation inside the panel housing. This design simplifies the installation process of the inverter keyboard, improves installation efficiency, reduces installation costs, and makes the overall appearance cleaner and more aesthetically pleasing.

[0036] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A frequency converter keypad, comprising a panel housing; characterized in that, It also includes a film, silicone buttons, and a button circuit board. The front of the panel housing is provided with a mounting groove. The silicone buttons and the button circuit board are arranged in the mounting groove from the outside to the inside. The film covers the mounting groove, the silicone buttons, and the panel housing. The area on the back of the film that abuts against the front of the silicone buttons and the front of the panel housing is provided with adhesive.

2. The inverter keyboard according to claim 1, characterized in that, The front of the button circuit board abuts against the back of the silicone button, and the back of the button circuit board abuts against the bottom of the mounting groove. The front and back of the button circuit board, as well as the back of the silicone button, are all provided with adhesive backing.

3. The inverter keyboard according to claim 1, characterized in that, The silicone button includes multiple button bodies, and the film has button through holes through which the button bodies pass.

4. The inverter keyboard according to claim 1, characterized in that, It also includes a circuit board assembly, which is disposed inside the panel housing, and the button circuit board is electrically connected to the circuit board assembly; The circuit board assembly includes a display screen, and the panel housing, button circuit board, and silicone buttons are all provided with display windows.

5. The inverter keyboard according to claim 4, characterized in that, The panel housing includes a front housing and a rear housing. The front housing is provided with a female buckle, and the rear housing is provided with a male buckle. The female buckle and the male buckle are engaged.

6. The inverter keyboard according to claim 5, characterized in that, The rear housing is provided with a limiting post, and the circuit board assembly is provided with a limiting hole, through which the limiting post passes.

7. The inverter keyboard according to claim 5, characterized in that, It also includes cables, and the mounting groove is provided on the front of the front housing, with a cable outlet hole inside the mounting groove; The button circuit board is provided with a bus terminal, which is located on the back of the button circuit board. The cable passes through the outlet hole and is electrically connected to the bus terminal and the circuit board assembly respectively.

8. The inverter keyboard according to claim 7, characterized in that, The button circuit board is also provided with multiple button springs, which are located on the front side of the button springs. The bus terminal is the electrical junction point of the multiple button springs.

9. The inverter keyboard according to claim 4, characterized in that, The circuit board assembly also includes a lamp post, and the panel housing, button circuit board, and silicone buttons are all provided with lamp holes.

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