Detachable double-display keyboard for frequency converter

Abstract

The utility model discloses a detachable double-display keyboard for a frequency converter, which relates to the technical field of frequency converters and comprises a rear shell, a circuit board and a front shell. Buttons are arranged at the front end of the circuit board, buttons are installed on the front end face of the front shell and correspond to the buttons in a one-to-one mode, wire holes are formed in the rear end of the rear shell, the rear shell and the front shell are matched to form an installation cavity, and the circuit board is installed in the installation cavity. A clamping structure is arranged at the contact position of the front shell and the button, the button is stable and easy to replace through the clamping structure, and the button cannot loosen or fall off after being used in an extreme environment or used for a long time. The dismounting structures are arranged at the upper and lower ends of the front shell, and the lock rod is separated from the lock hole of the frequency converter mounting groove by moving the moving block through the dismounting structures, so that the keyboard is dismounted, and the operation is simple; and a display structure is mounted in the mounting cavity, is electrically connected with the circuit board, and is used for displaying various basic parameters of the frequency converter in real time.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency converters, in particular to a detachable dual-display keyboard for a frequency converter. Background Art

[0002] Traditional inverter keyboards are mostly fixed-installed, which is not only complicated to disassemble and assemble and has high maintenance costs, but some keyboards only have a single display screen, which makes it difficult to meet users' needs for real-time viewing of diverse operating parameters.

[0003] The patent document with the existing patent announcement number CN221040912U records an inverter and an inverter keyboard. The inverter keyboard includes a panel shell, a silicone button and a circuit board assembly. Specifically, the silicone button is arranged on the front end surface of the panel shell. The design of the silicone button makes the button have a good touch and is convenient for users to operate. The abutting surface of the silicone button and the panel shell is provided with a backing glue. The circuit board assembly is arranged in the panel shell. The silicone button is affixed to the panel shell through the backing glue. The backing glue and the silicone button are integrated to avoid dust from entering the circuit board assembly from the panel shell due to gaps. A switch button is provided on the circuit board assembly. The switch button corresponds to the silicone button one by one. When in use, the silicone button is pressed to achieve the connection between the silicone button and the switch button. The inverter keyboard arranged in the above manner can enable the silicone button to be assembled from the outside, which is simple to install and has no gaps, so as to make the appearance more beautiful and low in cost.

[0004] However, although the above inverter keyboard can achieve seamless connection between the silicone keys and the panel housing through the adhesive backing, the adhesive backing may lose its stickiness after long-term use or exposure to extreme environments (such as high temperature and high humidity), causing the silicone keys to loosen or fall off.

[0005] Based on this, a detachable dual-display keyboard for a frequency converter is now provided, which can eliminate the disadvantages of the existing devices. Utility Model Content

[0006] The purpose of the utility model is to provide a detachable dual-display keyboard for a frequency converter, so as to solve the problem in the background art that the adhesive backing may lose its stickiness after long-term use or in extreme environments, causing the silicone keys to loosen or fall off.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A detachable dual-display keyboard for a frequency converter, comprising a rear housing, a circuit board, and a front housing;

[0009] The front end of the circuit board is provided with a button, the front end surface of the front shell is installed with a button, the buttons correspond to the buttons one by one, the rear end of the rear shell is provided with a wiring hole, the rear shell and the front shell cooperate to form a mounting cavity, and the circuit board is installed inside the mounting cavity;

[0010] It also includes a clamping structure, which is arranged at a contact position between the front shell and the button and is used to install the button on the front end surface of the front shell;

[0011] The disassembly and assembly structure is provided at the upper and lower ends of the front shell and is used to install the keyboard in the inverter installation slot;

[0012] The display structure is installed inside the installation cavity and is electrically connected to the circuit board, and is used to display various basic parameters of the inverter in real time.

[0013] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0014] In an optional solution: the snap-on structure includes a groove, which is opened at the front end of the front shell and matches the button, and a plurality of button openings are opened inside the groove, and the button abuts against the key through the button openings, and an outer groove is opened at the front end of the front shell, and the outer groove is located outside the groove, and a fixing component is installed inside the outer groove.

[0015] In an optional solution: the fixing component includes a snap-in slot and an outer frame, the snap-in slot is opened on the inner wall of the outer slot, the outer frame is slidably installed inside the outer slot, a spring piece matching the snap-in slot is fixedly installed on the outer wall of the outer frame, and a pressure plate for fixing the button is fixedly installed at the front end of the outer frame.

[0016] In an optional solution: the disassembly and assembly structure includes a fixed block, which is fixedly installed at the upper and lower ends of the front shell, a movable groove is opened inside the fixed block, sliding openings are opened on the left and right sides of the fixed block, and a movable opening is opened at the end of the fixed block away from the front shell, the sliding opening and the movable opening are connected to the inside of the movable groove, and connecting components are provided inside the sliding opening, the movable opening and the movable groove.

[0017] In an optional solution: the connecting assembly includes a reset spring, a movable block, a moving block, and a locking rod, the reset spring is installed inside the movable groove, one end of the reset spring is fixedly connected to the inner wall of the movable groove, the other end of the reset spring is fixedly connected to the movable block, the movable block is slidably installed inside the movable groove, the other end of the movable block is fixedly connected to the locking rod, the outer wall of the locking rod is slidably connected to the inner wall of the sliding opening, the outer wall of the moving block is slidably connected to the inner wall of the moving opening, and one end of the moving block is fixedly connected to the movable block.

[0018] In an optional solution: the display structure includes two display screens, which are installed in a mounting cavity formed by the rear shell and the front shell and electrically connected to the circuit board, and two display ports matching the display screens are opened at the front end of the rear shell.

[0019] In an optional solution, an indicator light is installed inside the installation cavity formed by the rear shell and the front shell, and the indicator light is electrically connected to the circuit board.

[0020] In an optional solution: a transparent plate is installed at the front end of the rear shell, and the transparent plate corresponds to the position of the indicator light.

[0021] In an optional solution: a plurality of inner side plates are fixedly mounted on the front end of the rear shell, and the accommodating cavity formed between the plurality of inner side plates matches the size of the circuit board.

[0022] In an optional solution: a rear bolt seat is fixedly installed at the front corner of the rear shell, a bolt hole is opened at the front end of the rear bolt seat, and the bolt hole passes through the rear end of the rear shell; a front bolt seat is fixedly installed at the rear corner of the front shell, and a bolt hole is opened at the rear end of the front bolt seat.

[0023] In an optional solution, the rear bolt seat has the same outer diameter as the front bolt seat, a positioning cylinder is fixedly installed on the outside of the front bolt seat, and the inner diameter of the positioning cylinder is the same as the outer diameter of the rear bolt seat.

[0024] In an optional solution: the button is made of silicone material.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1. The utility model ensures that the button is stable and easy to replace through the snap-on structure, and the button will not loosen or fall off when used in extreme environments or after long-term use.

[0027] 2. The utility model adopts a disassembly and assembly structure, and the locking rod is disengaged from the lock hole of the inverter installation slot by moving the moving block, thereby realizing the disassembly of the keyboard, and the operation is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural diagram of the present utility model.

[0029] Figure 2 It is a structural diagram showing the positions of various components of the present invention.

[0030] Figure 3 This is a structural diagram of the rear end position of the utility model.

[0031] Figure 4 This is a structural diagram of the rear shell and circuit board of the utility model.

[0032] Figure 5 It is a structural schematic diagram of the clamping structure of the utility model.

[0033] Figure 6 It is a structural diagram of the disassembly and assembly structure of the utility model.

[0034] Notes on figure markings: 11. rear shell; 12. inner plate; 13. rear bolt seat; 14. bolt hole; 15. wire hole; 16. circuit board; 17. indicator light; 18. display screen; 19. button; 20. front shell; 21. transparent plate; 22. display port; 23. groove; 24. button port; 25. outer groove; 26. snap-on groove; 27. outer frame; 28. spring; 29. ​​pressure plate; 30. button; 31. fixed block; 32. movable groove; 33. sliding port; 34. moving port; 35. reset spring; 36. movable block; 37. moving block; 38. locking rod; 39. positioning cylinder; 40. front bolt seat. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0036] In one embodiment, Figures 1-6 As shown, a detachable dual-display keyboard for a frequency converter includes a rear shell 11, a circuit board 16, and a front shell 20;

[0037] A button 19 is provided at the front end of the circuit board 16, and a button 30 is installed on the front surface of the front shell 20. The buttons 30 correspond to the buttons 19 one by one. A wiring hole 15 is opened at the rear end of the rear shell 11. The rear shell 11 and the front shell 20 cooperate to form a mounting cavity, and the circuit board 16 is installed inside the mounting cavity.

[0038] It also includes a snap-fit ​​structure, which is provided at a contact position between the front shell 20 and the button 30 and is used to mount the button 30 on the front end surface of the front shell 20;

[0039] The disassembly and assembly structure is provided at the upper and lower ends of the front shell 20 and is used to install the keyboard in the inverter installation slot;

[0040] The display structure is installed inside the installation cavity and is electrically connected to the circuit board 16, and is used to display various basic parameters of the inverter in real time.

[0041] In this embodiment, the user leads the control line out of the keyboard from the wire hole 15 of the rear shell 11, assembles the front shell 20 and the rear shell 11 together, and then the user installs the button 30 on the front end surface of the front shell 20 through the snap-fit ​​structure. Thereafter, the user installs the keyboard in the inverter installation slot through the disassembly structure. The real-time data inside the inverter (such as frequency, current, voltage, etc.) is transmitted to the display structure through the circuit board 16, and the display structure displays these data in the form of numbers or graphics for the user to view.

[0042] In one embodiment, Figure 2 and Figure 5 As shown, the snap-fit ​​structure includes a groove 23, which is opened at the front end of the front shell 20 and matches the button 30. A number of button openings 24 are opened inside the groove 23, and the button 30 abuts against the key 19 through the button openings 24. An outer groove 25 is opened at the front end of the front shell 20, and the outer groove 25 is located outside the groove 23. A fixing component is installed inside the outer groove 25.

[0043] Through the interaction of the groove 23, the button opening 24, the outer groove 25 and the fixing assembly, the snap-fit ​​structure can achieve a stable connection between the button 30 and the front shell 20, preventing loosening or falling off during use.

[0044] In one embodiment, Figure 2 and Figure 5 As shown, the fixing component includes a snap-in groove 26 and an outer frame 27. The snap-in groove 26 is opened on the inner wall of the outer groove 25. The outer frame 27 is slidably installed inside the outer groove 25. The outer wall of the outer frame 27 is fixedly installed with a spring piece 28 matching the snap-in groove 26. The front end of the outer frame 27 is fixedly installed with a pressure plate 29 for fixing the button 30.

[0045] The cooperation between the outer groove 25 and the fixing components (the snap-fit ​​groove 26 , the outer frame 27 , the spring 28 , and the pressure plate 29 ) further strengthens the installation of the button 30 and prevents it from loosening or falling off during use.

[0046] In one embodiment, Figure 6 As shown, the disassembly and assembly structure includes a fixed block 31, which is fixedly installed at the upper and lower ends of the front shell 20. A movable groove 32 is provided inside the fixed block 31, and sliding openings 33 are provided on the left and right sides of the fixed block 31. A movable opening 34 is provided at the end of the fixed block 31 away from the front shell 20, and the sliding opening 33 and the movable opening 34 are connected to the inside of the movable groove 32. Connecting components are provided inside the sliding opening 33, the movable opening 34 and the movable groove 32.

[0047] It should be noted that the interior of the movable slot 32 and the sliding openings 33 on both sides provide space for the connecting components to move, allowing the keyboard to slide smoothly into and out of the inverter's mounting slot. The presence of the disassembly structure allows the keyboard to be quickly removed from the inverter when maintenance or replacement is required, reducing maintenance costs and time.

[0048] In one embodiment, Figure 6As shown, the connecting assembly includes a return spring 35, a movable block 36, a moving block 37, and a locking rod 38. The return spring 35 is installed inside the movable groove 32, one end of the return spring 35 is fixedly connected to the inner wall of the movable groove 32, and the other end of the return spring 35 is fixedly connected to the movable block 36. The movable block 36 is slidably installed inside the movable groove 32, and the other end of the movable block 36 is fixedly connected to the locking rod 38. The outer wall of the locking rod 38 is slidably connected to the inner wall of the sliding opening 33, the outer wall of the moving block 37 is slidably connected to the inner wall of the moving opening 34, and one end of the moving block 37 is fixedly connected to the movable block 36.

[0049] When an external force acts on movable block 37, movable block 36 slides along movable slot 32, compressing return spring 35. Locking rod 38 then moves and may extend into the locking hole or slot in the inverter mounting slot, locking the keyboard to the inverter. When the external force disappears, return spring 35 releases its stored energy, pushing movable block 36 and locking rod 38 back to their initial positions, unlocking the keyboard.

[0050] In one embodiment, Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown, the display structure includes two display screens 18, which are installed inside the installation cavity formed by the rear shell 11 and the front shell 20 and are electrically connected to the circuit board 16. The front end of the rear shell 11 is provided with two display ports 22 matching the display screens 18.

[0051] When circuit board 16 receives data from a processor or other signal source, it transmits the data to display screen 18 via a data line. Display screen 18 generates images or information based on the received data and displays them to the user. The user can observe the content on display screen 18 to understand the device's operating status, operation results, or other related information.

[0052] In one embodiment, Figure 1 As shown, an indicator light 17 is installed inside the installation cavity formed by the rear shell 11 and the front shell 20 , and the indicator light 17 is electrically connected to the circuit board 16 .

[0053] An indicator light 17 is also installed inside the installation cavity, and the indicator light 17 is electrically connected to the circuit board 16; when the inverter is in a specific state (such as operating state, fault state), the control chip will control the corresponding indicator light 17 to light up, visually feedback the device status to the user.

[0054] In one embodiment, Figure 2 As shown, a transparent plate 21 is installed at the front end of the rear shell 11 , and the transparent plate 21 corresponds to the position of the indicator light 17 .

[0055] The transparent plate 21 is mounted on the front end of the rear housing 11 and corresponds to the position of the indicator light 17 , ensuring that the brightness of the indicator light can be clearly transmitted to the user.

[0056] In one embodiment, Figure 4 As shown, a plurality of inner panels 12 are fixedly mounted on the front end of the rear shell 11 , and the accommodating cavity formed between the plurality of inner panels 12 matches the size of the circuit board 16 .

[0057] The accommodating cavity formed by the inner plates 12 matches the size of the circuit board, which helps to fix and protect the circuit board.

[0058] In one embodiment, Figure 3 and Figure 4 As shown, a rear bolt seat 13 is fixedly installed at the front corner of the rear shell 11, and a bolt hole 14 is opened at the front end of the rear bolt seat 13. The bolt hole 14 passes through the rear end of the rear shell 11. A front bolt seat 40 is fixedly installed at the rear corner of the front shell 20, and a bolt hole 14 is opened at the rear end of the front bolt seat 40.

[0059] The bolt holes 14 are designed to allow bolts to pass through, thereby firmly connecting the front shell 20 and the rear shell 11 together. This connection method is both reliable and easy to disassemble and maintain.

[0060] In one embodiment, Figure 3 As shown, the rear bolt seat 13 has the same outer diameter as the front bolt seat 40 , and a positioning cylinder 39 is fixedly installed on the outside of the front bolt seat 40 , and the inner diameter of the positioning cylinder 39 is the same as the outer diameter of the rear bolt seat 13 .

[0061] Because the rear bolt seat 13 and the front bolt seat 40 have the same outer diameter, and the inner diameter of the positioning cylinder 39 also matches them, this design ensures that the front shell 20 and the rear shell 11 are precisely aligned and coaxial during assembly. Guided by the positioning cylinder 39, the front bolt seat 40 can accurately mate with the rear bolt seat 13, ensuring that the bolts remain vertical and evenly stressed when passing through the bolt holes, thereby enhancing the rigidity and stability of the connection.

[0062] In one embodiment, Figure 2 and Figure 5 As shown, the button 30 is made of silicone material.

[0063] The button 30 is made of silicone material. The silicone button 30 is soft and durable and provides good tactile feedback.

[0064] The above embodiment discloses a detachable dual-display keyboard for a frequency converter, wherein the user leads the control wires out of the keyboard through the wire hole 15 of the rear housing 11, mates the front housing 20 with the rear housing 11, and the rear housing 11 and the front housing 20 are fixedly connected by bolts and bolt seats (front bolt seat 40, rear bolt seat 13);

[0065] When the button 30 is placed in the groove 23, its bottom passes through the button opening 24 and abuts against the button 19, and the outer frame 27 in the fixing assembly is pushed into the outer groove 25, and the spring piece 28 is snapped into the snap-fit ​​groove 26. During this process, the elastic deformation of the spring piece 28 enables the outer frame 27 to fit tightly against the inner wall of the outer groove 25, thereby achieving a preliminary fixing effect. The pressure plate 29 is fixed to the front end of the outer frame 27 and directly presses the button 30; when the button 30 needs to be removed, the spring piece 28 can be elastically deformed by applying appropriate force, thereby escaping from the snap-fit ​​groove 26.

[0066] The sliding movement of movable block 37 within movable opening 34 pushes or pulls movable block 36 along movable slot 32, thereby controlling the extension or retraction of locking rod 38. Movable block 36 is assisted in returning to its original position by return spring 35, ensuring that locking rod 38 can switch between locked and unlocked states. When locked, the end of locking rod 38 engages the locking hole to prevent separation, while when unlocked, locking rod 38 retracts to allow separation.

[0067] When circuit board 16 receives data from a processor or other signal source, it transmits the data to display screen 18 via a data line. Display screen 18 generates images or information based on the received data and displays them to the user. The user can observe the content on display screen 18 to understand the device's operating status, operation results, or other related information.

[0068] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A detachable dual-display keyboard for a frequency converter, comprising a rear housing (11), a circuit board (16), and a front housing (20); It is characterized by: The front end of the circuit board (16) is provided with a key (19), the front end surface of the front shell (20) is provided with a button (30), the button (30) corresponds to the key (19) one by one, the rear end of the rear shell (11) is provided with a wire hole (15), the rear shell (11) and the front shell (20) cooperate to form a mounting cavity, and the circuit board (16) is mounted inside the mounting cavity; It also includes a clamping structure, which is arranged at a contact position between the front shell (20) and the button (30) and is used to install the button (30) on the front end surface of the front shell (20); A disassembly and assembly structure, which is arranged at the upper and lower ends of the front shell (20) and is used to install the keyboard in the inverter installation slot; A display structure is installed inside the installation cavity and electrically connected to the circuit board (16), and is used for displaying various basic parameters of the frequency converter in real time.

2. The detachable dual-display keyboard for a frequency converter according to claim 1, characterized in that: The clamping structure comprises a groove (23), the groove (23) being provided at the front end of the front shell (20) and matching with the button (30), a plurality of button openings (24) being provided inside the groove (23), the button (30) passing through the button openings (24) and abutting against the key (19), an outer groove (25) being provided at the front end of the front shell (20), the outer groove (25) being located outside the groove (23), and a fixing component being installed inside the outer groove (25).

3. The detachable dual-display keyboard for a frequency converter according to claim 2, characterized in that: The fixing assembly comprises a snap-fit ​​groove (26) and an outer frame (27); the snap-fit ​​groove (26) is provided on the inner wall of the outer groove (25); the outer frame (27) is slidably mounted inside the outer groove (25); a spring piece (28) matching the snap-fit ​​groove (26) is fixedly mounted on the outer wall of the outer frame (27); and a pressure plate (29) for fixing a button (30) is fixedly mounted on the front end of the outer frame (27).

4. The detachable dual-display keyboard for a frequency converter according to claim 1, characterized in that: The disassembly and assembly structure comprises a fixed block (31), wherein the fixed block (31) is fixedly mounted at the upper and lower ends of the front shell (20), a movable groove (32) is provided inside the fixed block (31), sliding openings (33) are provided on the left and right sides of the fixed block (31), a movable opening (34) is provided at one end of the fixed block (31) away from the front shell (20), the sliding opening (33) and the movable opening (34) are connected to the inside of the movable groove (32), and a connecting component is provided inside the sliding opening (33), the movable opening (34) and the movable groove (32).

5. The detachable dual-display keyboard for a frequency converter according to claim 4, characterized in that: The connecting assembly includes a reset spring (35), a movable block (36), a moving block (37), and a locking rod (38). The reset spring (35) is installed inside the movable groove (32). One end of the reset spring (35) is fixedly connected to the inner wall of the movable groove (32). The other end of the reset spring (35) is fixedly connected to the movable block (36). The movable block (36) is slidably installed inside the movable groove (32). The other end of the movable block (36) is fixedly connected to the locking rod (38). The outer wall of the locking rod (38) is slidably connected to the inner wall of the sliding opening (33). The outer wall of the moving block (37) is slidably connected to the inner wall of the moving opening (34). One end of the moving block (37) is fixedly connected to the movable block (36).

6. The detachable dual-display keyboard for a frequency converter according to claim 1, characterized in that: The display structure includes two display screens (18), which are installed in a mounting cavity formed by the rear shell (11) and the front shell (20) and are electrically connected to the circuit board (16). The front end of the rear shell (11) is provided with two display ports (22) that match the display screens (18).

7. The detachable dual-display keyboard for a frequency converter according to claim 1, characterized in that: An indicator light (17) is installed inside the installation cavity formed by the rear shell (11) and the front shell (20), and the indicator light (17) is electrically connected to the circuit board (16).

8. The detachable dual-display keyboard for a frequency converter according to claim 7, characterized in that: A transparent plate (21) is installed at the front end of the rear shell (11), and the transparent plate (21) corresponds to the position of the indicator light (17).

9. The detachable dual-display keyboard for a frequency converter according to claim 1, characterized in that: A plurality of inner side plates (12) are fixedly mounted on the front end of the rear shell (11), and the accommodating cavity formed between the plurality of inner side plates (12) matches the size of the circuit board (16).

10. The detachable dual-display keyboard for a frequency converter according to claim 1, characterized in that: A rear bolt seat (13) is fixedly mounted at a front corner of the rear shell (11), a bolt hole (14) is provided at the front end of the rear bolt seat (13), and the bolt hole (14) passes through the rear end of the rear shell (11). A front bolt seat (40) is fixedly mounted at a rear corner of the front shell (20), and a bolt hole (14) is provided at the rear end of the front bolt seat (40).

11. The detachable dual-display keyboard for a frequency converter according to claim 10, characterized in that: The rear bolt seat (13) and the front bolt seat (40) have the same outer diameter, and a positioning cylinder (39) is fixedly installed on the outside of the front bolt seat (40), and the inner diameter of the positioning cylinder (39) is the same as the outer diameter of the rear bolt seat (13).

12. The detachable dual-display keyboard for a frequency converter according to claim 1, characterized in that: The button (30) is made of silica gel.

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