A digital display measuring instrument

Abstract

The utility model discloses a kind of measuring instruments of digital display, including bottom shell, circuit board with component and wiring terminal, and light-transmitting cover shell, digital display device is equipped on circuit board, wherein, digital display device includes light guide seat, digital lamp cavity, digital lamp position and digital lamp, light guide seat is detachably mounted on circuit board by the cooperation of snap hook, socket, digital lamp cavity is located on light guide seat, digital lamp cavity is constituted by seven pen segment cavities and a decimal point cavity, digital lamp position is integrally formed on circuit board, digital lamp position is constituted by seven pen segment positions and a decimal point position, digital lamp position is correspondingly arranged with digital lamp cavity, digital lamp patch is welded on corresponding pen segment position and decimal point position.The utility model separately sets digital lamp cavity and digital lamp position on circuit board and light guide seat, so after light guide seat is disassembled, single digital lamp can be repaired and replaced, body structure design is reasonable, easy to disassemble and repair, and use cost is also relatively lower.

Description

Technical Field

[0001] This utility model relates to the field of instrument technology, and in particular to a digital display measuring instrument. Background Technology

[0002] Electrical measuring instruments are used to measure common electrical parameters in three-phase power grids and are widely used in various control systems and switch cabinets. Currently, electrical measuring instruments on the market have digital display devices on their circuit boards. The digital display devices in existing electrical measuring instruments use integrated digital tubes, which integrate digital lights onto a reflector cover and then solder the pins on the reflector cover to the circuit board. When an electrical measuring instrument with this structure is used, if the digital light corresponding to one segment of the digital tube is damaged, the entire digital tube must be replaced. Moreover, the connection between the digital tube and the circuit board via pin soldering is inconvenient to disassemble, resulting in high maintenance costs and an unreasonable structural design. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a digital display measuring instrument that is easy to disassemble and maintain and has relatively low operating costs.

[0004] The technical solution adopted by this utility model to solve its technical problem is a digital display measuring instrument, including a bottom shell, a circuit board with components and terminals, and a light-transmitting cover. The bottom shell has a mounting cavity, the circuit board is installed in the mounting cavity, and a digital display device is provided on the circuit board. The light-transmitting cover is placed over the opening of the mounting cavity. The digital display device includes a light guide base, a digital lamp cavity, digital lamp positions, and digital lamps. The light guide base is detachably installed on the circuit board through the cooperation of hooks and latches. The digital lamp cavity is disposed on the light guide base and is composed of seven segment cavities and a decimal point cavity. The digital lamp positions are integrally formed on the circuit board and are composed of seven segment positions and a decimal point position. The digital lamp positions are correspondingly arranged with the digital lamp cavities, and the digital lamp patches are soldered to the corresponding segment positions and decimal point positions.

[0005] The advantages of the above technical solution are as follows: During production, the digital lamps are first soldered onto the corresponding segment and decimal point positions. Then, the light guide is attached to the circuit board. After installation, the digital lamps connected to the corresponding segment and decimal point positions are located in the segment and decimal point cavities of the light guide. After being installed in the equipment, the purpose of digital display can be achieved. Therefore, by placing the digital lamp cavity, composed of the segment and decimal point cavities, on the light guide, the digital lamps achieve the purpose of digital display. Furthermore, by placing the digital lamp positions, composed of the segment and decimal point positions, on the circuit board, rapid surface mounting of the digital lamps can be achieved in conjunction with automated equipment, resulting in higher production efficiency. Moreover, by placing the digital lamp cavity and digital lamp positions on the circuit board and the light guide respectively, maintenance and replacement can be performed simply by disengaging the hooks on the light guide from the clips on the circuit board. This facilitates disassembly and allows for the maintenance and replacement of individual digital lamps. The overall structure is reasonably designed, facilitating disassembly and maintenance, and the operating cost is relatively low.

[0006] In this embodiment, the measuring instrument further includes four metal mounting parts connected to the plate. Each of the four outer side walls of the bottom shell is provided with a first mounting recess. The plate has the same shape as the first mounting recess and is fitted and fixed to the first mounting recess.

[0007] The advantages of the above technical solution are as follows: by setting multiple metal mounting parts, the measuring instrument is stably fixed on the external carrier. Furthermore, by using the method of fitting and fixing the plate with the first mounting recess, the metal mounting parts are stably connected to the outer wall of the bottom shell. The connection method is simple and can also reduce the processing cost of metal materials.

[0008] Furthermore, the measuring instrument also includes two plastic mounting parts. The lower end of each plastic mounting part is provided as an elastic locking arm. A rack is provided on the rear surface of the elastic locking arm. A second mounting recess is provided on the opposite outer wall of the bottom shell. A toothed groove is provided at the bottom of the second mounting recess. The toothed groove cooperates with the rack. Mounting blocks are also provided on both sides of the elastic locking arm. The mounting blocks are positioned above the rack. Mounting grooves are also provided on both sides of the second mounting recess. The mounting blocks cooperate with the mounting grooves.

[0009] The advantages of the above technical solution are: by setting multiple plastic mounting parts, the measuring instrument is stably fixed on the external carrier, and the plastic mounting parts are fixed by the cooperation of mounting blocks and mounting grooves, as well as the cooperation of toothed grooves and toothed racks, and the connection method is simple and reasonable.

[0010] Furthermore, the mounting block and the mounting groove are arranged at an angle, and a first column is also protruding in the mounting cavity. The first column is arranged corresponding to the second mounting recess, and the first column also forms a positioning fit with the positioning notch of the circuit board.

[0011] The advantages of the above technical solution are: the mounting block and the mounting groove are engaged by a bevel, so the mounting block and the second mounting recess at the mounting groove have high strength, making the use of plastic mounting parts more reliable. In addition, by setting the first column, the strength of the bottom shell at the second mounting recess is improved. At the same time, the first column also has the function of limiting the installation position of the circuit board. The structural design is reasonable and the use is safer.

[0012] Furthermore, a second column is provided inside the mounting cavity, the circuit board is placed on the second column, and a third column is provided on the inner wall of the light-transmitting cover, the third column being used to hold the circuit board in place.

[0013] The advantages of the above technical solution are: by setting the second column, the circuit board is supported; by setting the third column, the position of the circuit board can be effectively defined after it is placed on the second column; no screws are required for fixing throughout the process; the installation is convenient; and the structural design is reasonable.

[0014] Furthermore, the top of the outer side wall of the bottom shell is provided with a first surrounding skirt, and the edge of the light-transmitting cover is provided with a second surrounding skirt. The first skirt is positioned on the outside of the second skirt, and a snap-fit ​​structure is provided between the first skirt and the second skirt.

[0015] The advantages of the above technical solution are: the fastening structure between the first and second skirts enables a fixed connection between the light-transmitting cover and the bottom shell, which is simple and the installation and positioning method is relatively concealed, so that there are no obvious installation parts on the front surface of the measuring instrument, thus improving the overall aesthetics of the product.

[0016] Furthermore, a third mounting recess is provided on the upper surface of the light guide seat, the digital lamp cavity is located on the bottom surface of the third mounting recess, and a light-diffusing layer is provided in the third mounting recess, the thickness of the light-diffusing layer being 0.2-0.3mm.

[0017] The advantages of the above technical solution are as follows: by setting the third mounting recess, the installation of the light-diffusing layer is facilitated. The thickness of the light-diffusing layer is 0.2-0.3mm, which is relatively thin and has a good light-diffusing effect. This allows it to work with the digital lamp cavity to improve the display effect of the light guide seat. The structural design is reasonable. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a partial structural diagram of the present invention. Figure 1 ;

[0020] Figure 3 This is a partial structural diagram of the present invention. Figure 2 ;

[0021] Figure 4 This is a schematic diagram of the light guide base structure of this utility model;

[0022] Figure 5 The bottom shell structure of this utility model is viewed as follows Figure 1 ;

[0023] Figure 6 The bottom shell structure of this utility model is viewed as follows Figure 2 ;

[0024] Figure 7 This is a schematic diagram of the light-transmitting cover structure of this utility model;

[0025] Figure 8 This is a partial structural diagram of the present invention. Figure 3 ;

[0026] Figure 9 This is a schematic diagram of the plastic mounting component structure of this utility model.

[0027] In the diagram: 1-bottom shell, 2-circuit board, 3-terminal block, 4-light-transmitting cover, 5-mounting cavity, 6-digital display device, 7-light guide seat, 8-digital lamp cavity, 9-digital lamp position, 10-digital lamp, 11-hook, 12-bayonet, 13-pen segment cavity, 14-decimal point cavity, 15-pen segment position, 16-decimal point position, 17-metal mounting part, 18-plate, 19-first mounting recess, 20-plastic mounting part, 21-elastic locking arm, 22-rack, 23-second mounting recess, 24-tooth groove, 25-mounting block, 26-mounting slot, 27-first column, 28-second column, 29-third column, 30-first skirt, 31-second skirt, 32-buckle structure, 33-third mounting recess, 34-light-diffusing layer, 35-elastic mounting arm, 36-elastic support arm. Detailed Implementation

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model and / or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort. Furthermore, references to orientation only indicate the relative positional relationship between the components, not their absolute positional relationship.

[0029] Please see Figures 1 to 9 As shown, a digital display measuring instrument includes a base shell 1, a circuit board 2 with components and terminals 3, and a light-transmitting cover 4. The base shell 1 has a mounting cavity 5, and the circuit board 2 is mounted within the mounting cavity 5. The top of the base shell 1 is recessed into the mounting cavity 5 to form an insertion part, which has a socket that mates with the terminals 3, allowing the terminals 3 to extend. A digital display device 6 is mounted on the circuit board 2. The light-transmitting cover 4 covers the opening of the mounting cavity 5. The digital display device 6 includes a light guide 7, a digital lamp cavity 8, digital lamp positions 9, and... The digital lamp 10 and light guide base 7 are detachably mounted on the circuit board 2 via hooks 11 and bayonet 12. The digital lamp cavity 8 is located on the light guide base 7 and consists of seven segment cavities 13 and a decimal point cavity 14. The digital lamp position 9 is integrally formed on the circuit board 2 and consists of seven segment positions 15 and a decimal point position 16. The digital lamp positions 9 are correspondingly arranged with the digital lamp cavity 8. The digital lamp 10 is surface-mounted to the corresponding segment positions 15 and decimal point positions 16. More specifically, the digital lamp cavity 8 and the digital lamp position 9 will both have an 8-shaped structure. In the manufacturing process, the digital lamp 10 is first soldered into the corresponding segment 15 and decimal point 16. Then, the light guide 7 is attached to the circuit board 2. After installation, the digital lamp 10 connected to the corresponding segment 15 and decimal point 16 will be located in the segment cavity 13 and decimal point cavity 14 of the light guide 7. After being installed in the device, it can achieve the purpose of digital display. Therefore, the digital lamp cavity 8 composed of segment cavity 13 and decimal point cavity 14 is placed on the light guide 7 so that the digital lamp 10 can achieve the purpose of digital display. The digital lamp position 9, which consists of the decimal point 16, is located on the circuit board 2. This allows for rapid surface mount soldering of the digital lamp 10 in conjunction with automated equipment, resulting in higher production efficiency. Furthermore, by placing the digital lamp cavity 8 and the digital lamp position 9 on the circuit board 2 and the light guide seat 7, respectively, maintenance and replacement can be achieved simply by disengaging the hook 11 on the light guide seat 7 from the latch 12 on the circuit board 2. This facilitates easy disassembly and replacement of individual digital lamps 10. The overall structure is reasonably designed, making disassembly and maintenance convenient, and the operating cost is relatively low.

[0030] In this embodiment, the measuring instrument also includes four metal mounting parts 17, which are connected to the plate 18. The four outer side walls of the bottom shell 1 are provided with first mounting recesses 19. The plate 18 and the first mounting recesses 19 have the same shape and are fitted and fixed to each other. In the above structure, by setting multiple metal mounting parts 17, the purpose of the measuring instrument being stably fixed to the external carrier is achieved. Moreover, by using the method of fitting and fixing the plate 18 to the first mounting recesses 19, the metal mounting parts 17 are stably connected to the outer wall of the bottom shell 1. The connection method is simple and can also reduce the processing cost of metal materials. More specifically, the four metal mounting parts 17 are divided into two pairs and arranged diagonally.

[0031] In this embodiment, the measuring instrument also includes two plastic mounting parts 20. The lower end of the plastic mounting part 20 is provided as an elastic locking arm 21. A rack 22 is provided on the rear surface of the elastic locking arm 21. A second mounting recess 23 is provided on the opposite outer wall surface of the bottom shell 1. A toothed groove 24 is provided at the bottom of the second mounting recess 23. The toothed groove 24 cooperates with the rack 22. Mounting blocks 25 are also provided on both sides of the elastic locking arm 21. The mounting blocks 25 are positioned above the rack 22. Mounting grooves 26 are also provided on both sides of the second mounting recess 23. The mounting blocks 25 cooperate with the mounting grooves 26. In the above structure, by setting multiple plastic mounting parts 20, the purpose of stably fixing the measuring instrument on the external carrier is achieved. The plastic mounting parts 20 are fixed by the cooperation of the mounting blocks 25 and the mounting grooves 26 and the cooperation of the toothed grooves 24 and the rack 22. The connection method is simple and reasonable.

[0032] In this embodiment, a metal mounting part 17 and a plastic mounting part 20 are provided on the bottom shell 1. That is to say, two mounting methods are provided on the bottom shell 1. In this way, customers can choose to install the metal mounting part 17 or the plastic mounting part 20 according to the actual use situation, thereby realizing that one bottom shell 1 has multiple usage specifications and effectively reducing production costs.

[0033] In this embodiment, the mounting block 25 and the mounting groove 26 are arranged in an inclined plane. In the above structure, the mounting block 25 and the mounting groove 26 are connected by an inclined plane, so the mounting block 25 and the second mounting recess 23 have high strength at the mounting groove 26, making the use of the plastic mounting part 20 more reliable.

[0034] In this embodiment, a first column 27 is also provided in the mounting cavity 5. The first column 27 is provided corresponding to the second mounting recess 23, and the first column 27 also forms a positioning fit with the positioning notch of the circuit board 2. In the above structure, by providing the first column 27, the strength of the bottom shell 1 located at the second mounting recess 23 is improved. At the same time, the first column 27 also has the function of limiting the mounting position of the circuit board 2. The structure is reasonably designed and safer to use.

[0035] In this embodiment, a second column 28 is also provided inside the mounting cavity 5, and the circuit board 2 is placed on the second column 28. A third column 29 is provided on the inner wall of the light-transmitting cover 4. The third column 29 is used to hold the circuit board 2. In the above structure, by setting the second column 28, the circuit board 2 is provided with support. By setting the third column 29, the position of the circuit board 2 can be effectively defined after it is placed on the second column 29. No screws are required to fix it throughout the process, making the installation convenient and the structural design reasonable.

[0036] In this embodiment, a first skirt 30 is provided at the top of the outer side wall of the bottom shell 1, and a second skirt 31 is provided at the edge of the light-transmitting cover 4. The first skirt 30 is positioned on the outer side relative to the second skirt 31, and a snap-fit ​​structure 32 is provided between the first skirt 30 and the second skirt 31. The snap-fit ​​structure 32 includes a slot and a block. The slot is formed on the first skirt 30, and the block is formed on the second skirt 31. The light-transmitting cover 4 and the bottom shell 1 are fixedly connected by the snap-fit ​​structure 32 between the first skirt 30 and the second skirt 31. The method is simple, and the installation and positioning method is relatively concealed, so that there are no obvious installation parts on the front surface of the measuring instrument, which improves the overall aesthetics of the product.

[0037] In this embodiment, a third mounting recess 33 is also provided on the upper surface of the light guide base 7. The digital lamp cavity 8 is located on the bottom surface of the third mounting recess 33. A light-diffusing layer 34 is also provided in the third mounting recess 31. The light-diffusing layer 34 can be a film, and the thickness of the light-diffusing layer 34 is 0.2-0.3mm. In the above structure, by providing the third mounting recess 33, the installation of the light-diffusing layer 34 is facilitated. The thickness of the light-diffusing layer 34 is 0.2-0.3mm, which is relatively thin and has a good light-diffusing effect. Thus, it can cooperate with the digital lamp cavity 8 to improve the display effect of the light guide base 7. The structural design is reasonable.

[0038] In this embodiment, elastic mounting arms 35 are provided on the left and right sides of the upper end of the plastic mounting component 20. The elastic mounting arms 35 are obliquely upward. Elastic support arms 36 are also symmetrically provided on the top of the upper end of the plastic mounting component 20. The arrangement of the elastic support arms 36 and the elastic mounting arms 35 increases the contact area between the upper end of the plastic mounting component 20 and the panel and provides a certain pre-pressure. In use, after the measuring instrument is inserted into the panel, the plastic mounting component 20 is inserted into the second mounting recess 23. After being inserted into place, the measuring instrument can be reliably fixed.

[0039] In this embodiment, the ends of the elastic mounting arms 35 are all provided with cylindrical contact heads, and the rear end face of the contact head is hemispherical. The provision of contact heads increases the support points of the elastic mounting arms 35, thereby effectively increasing the preload.

[0040] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A digital display measuring instrument comprising a bottom shell (1), a circuit board (2) with components and terminal (3), and a light-transmitting cover shell (4), wherein the bottom shell (1) is provided with a mounting cavity (5), the circuit board (2) is mounted in the mounting cavity (5), the circuit board (2) is provided with a digital display device (6), and the light-transmitting cover shell (4) covers the opening of the mounting cavity (5), characterized in that: The digital display device (6) includes a light guide base (7), a digital lamp cavity (8), digital lamp positions (9), and a digital lamp (10). The light guide base (7) is detachably mounted on the circuit board (2) via hooks (11) and bayonet slots (12). The digital lamp cavity (8) is located on the light guide base (7). The digital lamp cavity (8) is composed of seven segment cavities (13) and a decimal point cavity (14). The digital lamp position (9) is integrally formed on the circuit board (2). The digital lamp position (9) is composed of seven segment positions (15) and a decimal point position (16). The digital lamp position (9) is correspondingly arranged with the digital lamp cavity (8). The digital lamp (10) is patch-welded to the corresponding segment position (15) and the decimal point position (16). ​ 2. A digital display measuring instrument according to claim 1, wherein: The measuring instrument also includes four metal mounting parts (17), which are connected to the plate (18). The bottom shell (1) has four outer side walls with first mounting recesses (19). The plate (18) has the same shape as the first mounting recesses (19), and the plate (18) is fitted and fixed to the first mounting recesses (19).

3. A digital display measuring instrument according to claim 1 or 2, characterized in that: The measuring instrument also includes two plastic mounting parts (20). The lower end of the plastic mounting part (20) is provided with an elastic locking arm (21). The rear surface of the elastic locking arm (21) is provided with a rack (22). The outer side wall of the bottom shell (1) is provided with a second mounting recess (23). The bottom of the second mounting recess (23) is provided with a toothed groove (24). The toothed groove (24) cooperates with the rack (22). The elastic locking arm (21) is also provided with mounting blocks (25) on both sides. The mounting blocks (25) are positioned above the rack (22). The second mounting recess (23) is also provided with mounting grooves (26) on both sides. The mounting blocks (25) cooperate with the mounting grooves (26).

4. A digital display measuring instrument according to claim 3, characterized in that: The mounting block (25) and the mounting groove (26) are arranged in an inclined plane, and a first column (27) is also provided in the mounting cavity (5). The first column (27) is provided corresponding to the second mounting recess (23), and the first column (27) also forms a positioning fit with the positioning notch of the circuit board (2).

5. A digital display measuring instrument according to claim 1 or 4, characterized in that: The mounting cavity (5) is also provided with a second column (28), the circuit board (2) is placed on the second column (28), and the inner wall of the light-transmitting cover (4) is provided with a third column (29), the third column (29) is used to hold the circuit board (2).

6. A digital display measuring instrument according to claim 1, characterized in that: The top of the outer side wall of the bottom shell (1) is provided with a first skirt (30) that surrounds the bottom shell (1), and the edge of the light-transmitting cover (4) is provided with a second skirt (31) that surrounds the bottom shell (4). The first skirt (30) is arranged on the outside of the first skirt (30), and a snap-fit ​​structure (32) is provided between the first skirt (30) and the second skirt (31).

7. A digital display measuring instrument according to claim 1, characterized in that: The upper surface of the light guide base (7) is also provided with a third mounting recess (33), the digital lamp cavity (8) is located on the bottom surface of the third mounting recess (33), and a light-diffusing layer (34) is also provided in the third mounting recess (33), and the thickness of the light-diffusing layer (34) is 0.2-0.3mm.

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