Digital display measuring device

Abstract

The utility model discloses a digital display measuring device which comprises a measuring rod assembly, a meter frame shell and a digital display assembly. The measuring rod assembly comprises a shell, a movable measuring rod, a sensor, a fixed gate fixed on the measuring rod and arranged opposite to the sensor, and a bias part; the sensor is used for converting the displacement of the fixed gate into the phase variation of an electric signal and transmitting the phase variation to the digital display assembly; the digital display assembly comprises a housing and a chip assembly, the chip assembly comprises a circuit board assembly and a touch display assembly, and the circuit board assembly is electrically connected with the sensor to receive the phase change amount sent by the sensor and display the phase change amount on the touch display assembly after corresponding processing. The grating and the sensor are matched with each other, mechanical displacement is converted into an electric signal, the electric signal enters a control PCBA (printed circuit board assembly), the mechanical displacement is displayed on an LCD display screen after a series of conversion and operation, and the grating displacement sensor can be used for wide-range measurement and is good in readability, simpler in structure and lower in cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of measuring equipment, and specifically relates to a digital display measuring device. Background Art

[0002] In the mechanical processing and manufacturing industries, some tasks such as the measurement and data collection of slot and hole shape tolerances, depth, etc., and data analysis usually require some large-scale tools. Currently used comparator products usually use inductance coils with a series of conversions to output data, with high accuracy, but also high cost, complex structure, and cannot be used as a large-scale measurement tool. This utility model is derived from this. Summary of the invention

[0003] In view of at least one of the above-mentioned technical problems, the purpose of the utility model is to provide a digital display measuring device, which adopts a grating and a sensor to cooperate with each other to convert the mechanical displacement into an electrical signal. The electrical signal enters the control PCBA (printed circuit board), and after a series of transformations and calculations, the size of the mechanical displacement is displayed on the LCD display. It can be used for a large range of measurements and has good readability, a simpler structure and a lower cost.

[0004] The technical solution of the utility model is:

[0005] The utility model provides a digital display measuring device, comprising a measuring rod assembly, a meter frame shell, and a digital display assembly which is sealed and mounted on the meter frame shell and electrically connected to the measuring rod assembly;

[0006] The measuring rod assembly comprises a rod-shaped housing with an axial cavity therein, a measuring rod movably arranged in the axial cavity in the housing, a sensor fixed on the housing and surrounded and sealed by the frame shell, a fixed grid fixed on the measuring rod and arranged opposite to the sensor to provide the sensor with a displacement of the measuring rod, and a biasing member connected to the measuring rod at one end and connected to the housing at the other end to provide a measuring force and a reset biasing force to the measuring rod, wherein the sensor is used to convert the displacement of the fixed grid into a phase change of an electrical signal and transmit it to the digital display assembly;

[0007] The digital display component includes a cover shell sealed to the watch frame shell by a seal and a chip component arranged in the cover shell, the chip component includes a circuit board component and a touch display component electrically connected to the circuit board component, the circuit board component is electrically connected to the sensor to receive the phase change sent by the sensor and display it on the touch display component after corresponding processing.

[0008] Optionally, a avoidance groove is opened on the outer peripheral wall of the shell sealed by the watch frame shell along the axial direction thereof, and two ends of the sensor are respectively fixed at the upper and lower ends of the avoidance groove.

[0009] Optionally, in a non-use state, the probe end of the measuring rod is outside the axial inner cavity of the shell, and the axial inner cavity of the shell is provided with a first inner cavity, a second inner cavity and a third inner cavity in sequence from the probe end of the measuring rod to the direction away from the probe end, the inner wall of the second inner cavity extends radially toward its axial center direction so that the inner diameter of the second inner cavity is smaller than the inner diameters of the first inner cavity and the third inner cavity, and a first step portion and a second step portion are respectively formed at the communicating position of the second inner cavity and the first inner cavity and at the communicating position of the second inner cavity and the third inner cavity, and a third step portion is formed at the end of the first inner cavity opposite to the first step portion;

[0010] A limit piece is provided on the outer peripheral wall of the measuring rod and protrudes radially outward. When not in use, the limit piece is located in the third inner cavity. During the measurement process of the measuring rod, the limit piece moves toward the first step portion in the third inner cavity along with the measuring rod. The first step portion is suitable for blocking the limit piece to limit the measuring stroke of the measuring rod, and the third step portion is suitable for blocking and limiting the end face of the fixed grid close to the probe end.

[0011] Optionally, the inner wall of only one circumferential side of the second inner cavity protrudes and extends radially toward the axial direction thereof so that the first step portion and the second step portion form semicircular step portions.

[0012] Optionally, the biasing member is a tubular straight spring whose axis is parallel to the displacement direction of the measuring rod and is arranged outside the measuring rod.

[0013] Optionally, the outer wall of the measuring rod is provided with a first fixing rod protruding and extending outward in its radial direction, and the outer peripheral wall of the first fixing rod is provided with a first groove recessed in its radial direction; the inner wall of the shell is provided with a second fixing rod protruding and extending in its radial direction toward its axial direction, and the outer peripheral wall of the second fixing rod is provided with a second groove recessed in its radial direction; one end of the biasing member is fixed in the first groove on the first fixing rod, and the other end is fixed in the second groove on the second fixing rod.

[0014] Optionally, the inner wall of the shell is further provided with a guide groove extending along its axial direction and recessed in its radial direction away from its axial center direction, and the outer wall of the measuring rod is provided with a guide slider protruding outward in its radial direction and slidably cooperating with the guide groove.

[0015] Optionally, the chip assembly is rotatably disposed on the watch frame shell;

[0016] The inner side of the opening where the cover shell and the watch frame shell meet is provided with a chip cover plate for fixing the chip assembly, and the chip cover plate is provided with a protrusion extending toward the watch frame shell on one side facing the shell, and the protrusion extends along the circumference of the chip cover plate at an angle α, and the α is less than 360°;

[0017] A positioning piece protruding and extending toward the chip cover plate is provided on the end surface of the watch frame shell facing the chip cover plate, and the chip component can rotate relative to the watch frame shell by an angle of β, and the sum of β and α is 360°. On both sides of the rotation angle range of the chip component relative to the watch frame shell, the positioning piece will interfere with the protrusion.

[0018] Optionally, the angle α of the protrusion extending in the circumferential direction is 90°.

[0019] Optionally, the circuit board assembly includes a battery and a circuit board, and the battery is electrically connected to the circuit board via a battery electrode thereon;

[0020] The touch display assembly includes a touch panel and an LCD display screen, the LCD display screen and the circuit board are connected and fixed by double-sided sponge adhesive and the LCD display screen and the circuit board are electrically connected by conductive rubber, and the touch panel is electrically connected to the circuit board by a soft wire;

[0021] The chip cover is provided with a grounding sheet connected to the battery electrode and a conductive shielding sheet for conducting the chip assembly with the sensor, the grounding sheet and the conductive shielding sheet are fixed together and the other end of the grounding sheet is fixed to the end surface of the chip cover facing the shell, and the other end of the conductive shielding sheet is in contact with the outer wall surface of the shell;

[0022] A diffuser for diffusing the warning light on the circuit board is also provided on the side of the circuit board facing the touch display component, and the diffuser extends toward the touch panel;

[0023] The housing is also provided with a detachable battery cover and a data port cover, wherein the battery cover is sealed on one side of the battery, and the data port cover is sealed on one side of the data interface electrically connected to the circuit board.

[0024] Compared with the prior art, the advantages of the utility model are:

[0025] The digital display measuring device of the utility model adopts the cooperation of grating and sensor to convert the mechanical displacement into electrical signal. The electrical signal enters the control PCBA (printed circuit board), and after a series of transformations and calculations, the size of the mechanical displacement is displayed on the LCD display screen. It can be used for a large range of measurements with good readability, simpler structure and lower cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0027] Figure 1 This is a schematic diagram of the main structure of the digital display measuring device according to an embodiment of the utility model;

[0028] Figure 2 for Figure 1 AA section structural diagram of the digital display measuring device;

[0029] Figure 3 for Figure 2 A partial enlarged structural diagram of the middle A part;

[0030] Figure 4 This is a schematic diagram of the cross-sectional structure of the measuring rod assembly of the digital display measuring device of the embodiment of the utility model, in which the sensor and the fixed grid are omitted;

[0031] Figure 5 for Figure 4 A schematic diagram of the partial enlarged structure of the middle B part;

[0032] Figure 6 It is a schematic diagram of a three-dimensional structure of a housing of a measuring rod assembly of a digital display measuring device according to an embodiment of the utility model, with the avoidance groove facing forward;

[0033] Figure 7 It is a schematic diagram of the top view of the housing of the measuring rod assembly of the digital display measuring device according to an embodiment of the utility model;

[0034] Figure 8 This is a schematic structural diagram of a chip assembly of a digital display measuring device according to an embodiment of the utility model, with a chip cover facing forward;

[0035] Fig. 9 This is a schematic structural diagram of a digital display measuring device in which a measuring rod assembly and a meter frame case are assembled together according to an embodiment of the utility model.

[0036] Among them: 10, frame shell; 11, inner edge; 12, positioning member; 20, measuring rod assembly; 21, housing; 210, avoidance groove; 211, first inner cavity; 212, second inner cavity; 213, third inner cavity; 214, first step portion; 215, second step portion; 216, third step portion; 217, semicircular step portion; 218, guide groove; 219, second fixing rod; 22, measuring rod; 221, stopper; 222, first fixing rod; 223, guide slider; 23, sensor; 231, fixing screw; 2 4. Fixed grid; 25. Biasing member; 26. Positioning screw; 30. Digital display assembly; 31. Cover; 311. Battery cover; 312. Data port cover; 32. Chip assembly; 320. Chip cover; 321. Circuit board assembly; 3210. Protrusion; 3211. Circuit board; 3212. Battery; 32121. Battery electrode; 322. Touch display assembly; 3221. LCD display; 3222. Touch panel; 323. Conductive rubber; 324. Grounding plate; 325. Conductive shielding plate; 326. Diffuser. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0038] See also Figures 1 to 9 A digital display measuring device according to an embodiment of the utility model comprises a meter frame housing 10, a measuring rod assembly 20 and a digital display assembly 30. The meter frame housing 10 is disc-shaped and is arranged on the measuring rod assembly 20 and is provided for the digital display assembly 30 to be installed and fixed. The digital display assembly 30 is electrically connected to the measuring rod assembly 20. The measuring rod assembly 20 is used to measure and obtain corresponding measurement data and convert it into an electrical signal and transmit it to the digital display assembly 30. The digital display assembly 30 obtains the corresponding required measurement data after a series of corresponding processing and displays it.

[0039] Specifically, Figure 2 and Figure 3As shown, the measuring rod assembly 20 includes a housing, a measuring rod 22, a sensor 23, a fixed grid 24 and a biasing member 25. The housing is rod-shaped and has an axial cavity inside so that the measuring rod 22 can move axially therein for measurement. The measuring rod 22 is movably arranged in the axial cavity of the housing, and the probe end of the measuring rod 22, i.e., the bottom end as shown in the figure, is exposed outside the housing. A pressable end cap is also provided at the top end of the housing, and the end cap is connected to the top end of the measuring rod 22, so that the user can control the measuring rod 22 to move along the axial cavity of the housing to achieve measurement. In order to achieve displacement measurement of the measuring rod 22, simplify the structure and reduce the cost, a fixed grating 24 (a conventional grating structure on the market, which is not described or limited in detail) extending along the moving direction of the measuring rod 22, i.e., the axial direction of the housing, is provided on the measuring rod 22, and a sensor 23 such as a conventional grating sensor 23 on the market is provided on the housing, which is not described or limited in detail. The sensor 23 is surrounded and sealed by the frame housing 10 to prevent water and the like from affecting the performance of the sensor 23. Since the fixed grating 24 is fixed on the measuring rod 22, and the measuring rod 22 can be moved relative to the housing under force, the fixed grating 24 will also generate displacement when the measuring rod 22 moves. The sensor 23 is used to convert the displacement of the fixed grating 24 into a phase change of an electrical signal and send it to the digital display assembly 30 for further processing and display. One end of the biasing member 25 is connected to the measuring rod 22, and the other end is connected to the housing to provide force measurement and reset bias force to the measuring rod 22. That is to say, when the measuring rod 22 is passively moved during use, it will overcome the biasing force of the biasing member 25, so that the measuring rod 22 is slowly moved by the biasing force of the biasing member 25, rather than moving to the bottom all at once, which can improve the measurement accuracy. When the measurement is completed, the biasing member 25 will provide a reset force to the measuring rod 22 so that the measuring rod 22 automatically returns to its initial state.

[0040] According to some preferred embodiments of the present invention, Figure 6 As shown, since the space of the axial inner cavity in the housing is limited, in order to simplify the size of the housing and facilitate the sensor 23 to better measure the displacement of the fixed grid 24 along the axial direction and expand the measurement range, an avoidance groove 210 extending along the axial direction of the housing is opened, and the sensor 23 is placed in the housing, for example, Figure 3 The fixing screws 231 and other components shown are fixed on both ends of the avoidance groove 210, so that the sensor 23 can conveniently and more widely measure the displacement of the fixed grid 24 along the axial inner cavity of the shell. Figure 3 A set screw 26 is shown to be fixedly connected to the frame housing 10 .

[0041] According to some preferred embodiments of the present invention, Figure 2 and Figure 3 and Figure 5As shown, in order to limit the movement of the measuring rod 22 so as to prevent the measuring rod 22 from continuing to move outside the measuring range of the sensor 23, a limiter 221 is further provided on the measuring rod 22. For example, an annular groove (not shown) is provided axially on the measuring rod 22, and the limiter 221 is a clamp ring fixed on the annular groove. The clamp ring will abut against the side wall of the axial inner cavity of the shell, thereby limiting the movement of the measuring rod 22. More specifically, in order to limit the movement of the measuring rod 22, the axial inner cavity of the shell is from close to the probe end to far away from the probe end, that is, as shown in FIG. Figure 3 As shown, the first inner cavity 211, the second inner cavity 212 and the third inner cavity 213 are provided in sequence from bottom to top. The inner diameters of the first inner cavity 211 and the third inner cavity 213 are both larger than the inner diameter of the second inner cavity 212. The inner diameter of the second inner cavity 212 is slightly larger than the outer diameter of the measuring rod 22. There is no specific limitation, as long as the measuring rod 22 can be smoothly moved along the axial direction without affecting the measurement. The inner diameter of the first inner cavity 211 and the inner diameter of the third inner cavity 213 are similar and both are larger than the outer diameter of the measuring rod 22. There is no specific limitation, in order to form a first step portion 214 and a second step portion 215 at the connection position between the first inner cavity 211 and the second inner cavity 212 and the connection position between the second inner cavity 212 and the third inner cavity 213, respectively, so that the first step portion 214 blocks the limiter 221 on the measuring rod 22 to limit the stroke of the measuring rod 22. That is to say, in the initial state, i.e., in the unused state, the stopper 221 is in the third inner cavity 213 and is located above the first step 214. When in use, the stopper 221 moves toward the first step 214 under the movement of the measuring rod 22 until the stopper 221 abuts against the first step 214, and the measuring rod 22 no longer moves downward. At the same time, a third step 216 is formed at the end of the first inner cavity 211 opposite to the second step 215. The purpose of the third step 216 is to form a contact with the measuring head end of the fixed grid 24 close to the measuring rod 22, i.e., Figure 3 The bottom end surface of the fixed grid 24 shown in the figure is blocked and limited. The travel of the measuring rod 22 is limited by double limiting. Generally speaking, when the limiting member 221 abuts against the first step portion 214, the bottom end of the fixed grid 24 also abuts against the third step portion 216.

[0042] According to the following preferred embodiments of the present utility model, Figure 5 As shown, in order to improve the position straightness of the measuring rod 22, a guide groove 218 extending along its axial direction and recessed along its radial direction away from its axial center direction is opened on the inside of the shell, and a guide slider 223 is provided on the outer wall of the measuring rod 22, which protrudes outward along its radial direction and slidably cooperates with the guide groove 218.

[0043] According to the following preferred embodiments of the present utility model, Figure 4 and Figure 5As shown, the biasing member 25 is a tubular straight spring whose axis is parallel to the displacement direction of the measuring rod 22 and is arranged outside the measuring rod 22. Figure 5 As shown, the outer wall of the measuring rod 22 is provided with a first fixing rod 222 protruding outward in the radial direction thereof, and the outer peripheral wall of the first fixing rod 222 is provided with a first groove (not marked) recessed in the radial direction thereof. The inner wall of the housing is provided with a second fixing rod 219 protruding in the radial direction thereof toward the axial direction thereof, and the outer peripheral wall of the second fixing rod 219 is provided with a second groove (not marked) recessed in the radial direction thereof. One end of the biasing member 25 is fixed in the first groove on the first fixing rod 222, and the other end is fixed in the second groove on the second fixing rod 219.

[0044] According to the following preferred embodiments of the present utility model, Figure 6 and Figure 7 As shown, in order to facilitate the installation of the biasing member 25, in the embodiment of the utility model, the inner wall of the second inner cavity 212 does not directly protrude and extend in the radial direction along the circumferential direction, that is, the inner wall of the second inner cavity 212 is not annular, but semi-annular, that is, the inner wall of the second inner cavity 212 only protrudes and extends in the axial direction on one side of the circumference, that is, the first step portion 214 and the second step portion 215 are semi-annular step portions. Thus, a part of space can be reserved for the installation and extension of the biasing member 25.

[0045] like Figure 2 and Figure 3 and Figure 8 As shown, the digital display component 30 includes a cover 31, a circuit board 3211 and a touch display component 322. The cover 31 is disc-shaped and matches the shape of the watch frame shell 10, and the two are sealed together by a rubber sealing ring. The chip component 32 is integrated by a circuit board component 321 and a touch display component 322 electrically connected to the circuit board component 321. The circuit board component 321 is electrically connected to the sensor 23, and is used to receive the phase change data sent by the sensor 23 and perform corresponding processing (calculation conversion, which is not described in detail and is not the innovation of the present utility model, but is a prior art) and then transmit it to the touch display component 322, which displays it, so as to achieve intuitive visualization of the measurement data.

[0046] According to the following preferred embodiment of the utility model, due to the unpredictability of the measurement environment, sometimes the head needs to be tilted to read the measurement data. In order to solve this technical problem and improve the convenience of reading the measurement data on the touch display component 322 during measurement, the chip component 32 of the embodiment of the utility model can be rotated relative to the frame case 10. Preferably, the angle of rotation of the chip component 32 of the embodiment of the utility model relative to the frame case 10 is less than 360°, such as 270°. In order to achieve this purpose, specifically, as Figure 3and Figure 8 As shown, a chip cover plate 320 for fixing the chip is provided inside the opening where the cover shell 31 and the frame shell 10 meet. In fact, the cover shell 31 and the chip assembly 32 are an integrated structure. The cover shell 31 is actually a shell 21 of the chip assembly 32. The chip cover plate 320 is the inner end surface of the chip assembly 32 opposite to the touch display assembly 322. The chip cover plate 320 is used to fix the internal chip unit. The chip cover plate 320 is provided with a protrusion 3210 extending toward the frame shell 10, that is, the protrusion 3210 is not in the same plane as the surface of other positions of the chip cover plate 320 and extends more outward, that is, closer to the frame shell 10. Correspondingly, as shown in FIG. Fig. 9 As shown, an inner edge 11 is provided at the inner end of the watch frame housing 10 facing the chip cover plate 320, which protrudes inward along its radial direction and whose end face is sunken into the end of the watch frame housing 10 and the digital display component 30 for sealing cooperation. A positioning member 12 such as a positioning pin is provided on the inner edge 11, which protrudes outward, i.e., toward the chip cover plate 320 of the chip component 32, and the outer end of the positioning pin is close to other positions of the chip cover plate 320. The protrusion 3210 extends along the circumferential direction of the chip cover plate 320 at an angle α, and α is less than 360°. In the embodiment of the utility model, it is preferably 90°. Specifically, as Figure 8 As shown, the protrusion 3210 is a 90° fan-shaped protrusion structure. The travel angle of the chip assembly 32 relative to the watch frame shell 10 is β, and the sum of β and α is 360°. In the embodiment of the utility model, the travel angle β is 270°, that is, the chip assembly 32 can rotate within an angle range of 270° relative to the watch frame shell 10, so that the digital display measuring device can rotate the chip assembly 32 in some usage scenarios to allow the user to directly read the measurement data and / or touch operation displayed by the touch display assembly 322 of the chip assembly 32 without tilting the head. On both sides of the travel angle range of the chip assembly 32 rotating relative to the watch frame shell 10, the positioning member 12 will interfere with the protrusion 3210. In other words, the two side walls of the protrusion 3210 will contact the positioning member 12 respectively so that the angle of rotation of the chip assembly 32 relative to the watch frame shell 10 is within the adaptation range.

[0047] Specifically, Figure 3 As shown, the circuit board assembly 321 includes a battery 3212 and a circuit board 3211. The battery 3212 is preferably a button battery 3212, and the circuit board 3211 is preferably a PCB circuit board 3211 (PCBA, printed circuit board). The positive and negative electrodes of the battery 3212 are respectively connected to battery pole pieces 32121, and the battery 3212 is connected to the PCB circuit board 3211 through the battery pole pieces 32121. Figure 3As shown, the battery 3212 is arranged at the bottom of the chip assembly 32, corresponding to the side of the protrusion 3210 facing the measuring rod assembly 20. The touch display assembly 322 includes a touch panel 3222 and an LCD display screen 3221. The touch panel 3222 is a touch glass panel. The user can touch the control operation to input various signals. The touch panel 3222 made of glass can improve the protection performance. The touch panel 3222 can be attached to the cover 31 through the high-strength double-sided adhesive (not shown) provided on the back thereof, and the touch panel 3222 is electrically connected to the circuit board 3211 using a soft wire (not shown), so that various signals input by touch on the touch panel 3222 are transmitted to the PCB circuit board 3211, and are displayed on the LCD display screen 3221 or displayed on the PCB circuit board 3211 through conversion. In other words, the touch panel 3222 can be used to control the display light on the circuit board 3211. Double-sided sponge adhesive (not marked) is pasted on the PCB circuit board 3211 and supports the screen of the LCD display screen 3221, so as to fix the LCD display screen 3221. The LCD display screen 3221 is electrically connected to the circuit board 3211 through the conductive rubber 323. The conductive rubber 323 can transmit the signal on the PCB circuit board 3211 to the LCD display screen 3221 and display it on the LCD display screen 3221. The LCD display screen 3221 has a stable display effect, is not affected by external interference, and has relatively low energy consumption, which can reduce the overall energy consumption of the equipment, reduce costs, improve stability, and improve the overall service life. The PCB circuit board 3211 can receive the signal of the sensor 23 and convert it through calculation and transmit the signal to the LCD display screen 3221 through the conductive rubber 323. The PCB circuit board 3211 can also display various input signals of the touch glass panel 3222 on the LCD display screen 3221 through calculation. The touch panel 3222 is preferably as follows Figure 1 As shown, there are multiple functional touch buttons (not marked). An alarm light (not marked) is also provided on the circuit board 3211, specifically on the end surface facing the touch panel 3222. A cylindrical diffuser 326 (which is a conventional component currently available on the market and will not be described or limited in detail) is provided outside the alarm light to diffuse the alarm light, so as to achieve the effect of optimizing the light. The chip cover plate 320 is provided with a grounding plate 324 connected to the battery electrode 32121 and a conductive shielding plate 325 that conducts the chip assembly 32 with the sensor 23. The conductive shielding plate 325 serves as a grounding plate, which can shield external signal interference and improve the stability of the product. Figure 8As shown, one end face of the grounding sheet 324 is fixed on the chip cover plate 320. The grounding sheet 324 includes a main body with a square shape in the middle and four connecting sheets formed by the four sides of the main body and extending outwards with a width smaller than the width of the grounding sheet 324. The connecting sheets are bent and fixed to the four sides of the conductive shielding sheet 325. The conductive shielding sheet 325 is a square structure, one end of which is attached to the grounding sheet 324 and the other end is in contact with the outer wall of the housing 21. In order to facilitate the replacement of the battery 3212, the outer side of the corresponding battery 3212 on the housing 31 is also as shown in FIG. Figure 3 The bottom end of the housing 31 shown is provided with a battery cover 311 that can be detachably connected, such as a grounded battery cover 311, and a sealing component such as a sealing ring can be added between the battery cover 311 and the housing 31 to improve protection. At the same time, the housing 31 is specifically provided with a data line interface that is electrically connected to the PCB circuit board 3211 on the top side as shown in the figure, so as to facilitate the export of data to other electronic devices such as computers through the data line. Correspondingly, a detachable data port cover 312 is also provided on the outside of the data line interface, and the data port cover 312 is sealed and connected to the housing 31.

[0048] In summary, when the digital display measuring device of the embodiment of the utility model is used, the end cover at the top of the housing 21 is pressed to drive the measuring rod 22 to move downward and extend into the groove or hole to be measured. When the probe end is against the bottom of the groove or reaches the bottom of the hole, the pressing is stopped, and the fixed grid 24 follows the measuring rod 22 to move the corresponding displacement. The sensor 23 converts the displacement of the fixed grid 24 into the phase change of the electrical signal and transmits it to the circuit board component 321 of the chip component 32. The control module in the chip performs calculations and processing to obtain the required measurement data (which is the prior art, not the innovation of the utility model), and then transmits it to the touch display component 322 for display. The use of the grating and the sensor 23 makes the overall structure simpler and less expensive than that of the inductor coil. Moreover, the fixed grid 24 is fixed on the measuring rod 22, and the range is determined by the displacement of the measuring rod 22. The measurement range can be larger, so it can be used for a large range of measurements.

[0049] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. A digital display measuring device, characterized in that: It includes a measuring rod assembly, a meter frame shell, and a digital display assembly which is sealed and mounted on the meter frame shell and electrically connected to the measuring rod assembly; The measuring rod assembly comprises a rod-shaped housing with an axial cavity therein, a measuring rod movably arranged in the axial cavity in the housing, a sensor fixed on the housing and surrounded and sealed by the frame shell, a fixed grid fixed on the measuring rod and arranged opposite to the sensor to provide the sensor with a displacement of the measuring rod, and a biasing member connected to the measuring rod at one end and connected to the housing at the other end to provide a measuring force and a reset biasing force to the measuring rod, wherein the sensor is used to convert the displacement of the fixed grid into a phase change of an electrical signal and transmit it to the digital display assembly; The digital display component includes a cover shell sealed to the watch frame shell by a seal and a chip component arranged in the cover shell, the chip component includes a circuit board component and a touch display component electrically connected to the circuit board component, the circuit board component is electrically connected to the sensor to receive the phase change sent by the sensor and display it on the touch display component after corresponding processing.

2. The digital display measuring device according to claim 1, characterized in that: An escape groove is provided on the outer peripheral wall of the housing sealed by the watch frame shell along the axial direction thereof, and the two ends of the sensor are respectively fixed at the upper and lower ends of the escape groove.

3. The digital display measuring device according to claim 1, characterized in that: In an unused state, the probe end of the measuring rod is outside the axial inner cavity of the housing, and the axial inner cavity of the housing is provided with a first inner cavity, a second inner cavity and a third inner cavity in sequence from the probe end of the measuring rod to the direction away from the probe end, and the inner wall of the second inner cavity extends radially toward its axial center direction so that the inner diameter of the second inner cavity is smaller than the inner diameters of the first inner cavity and the third inner cavity, and a first step portion and a second step portion are respectively formed at the communicating position of the second inner cavity and the first inner cavity and at the communicating position of the second inner cavity and the third inner cavity, and a third step portion is formed at the end of the first inner cavity opposite to the first step portion; A limit piece is provided on the outer peripheral wall of the measuring rod and protrudes radially outward. When not in use, the limit piece is located in the third inner cavity. During the measurement process of the measuring rod, the limit piece moves toward the first step portion in the third inner cavity along with the measuring rod. The first step portion is suitable for blocking the limit piece to limit the measuring stroke of the measuring rod, and the third step portion is suitable for blocking and limiting the end face of the fixed grid close to the probe end.

4. The digital display measuring device according to claim 3, characterized in that: The inner wall of only one side of the second inner cavity in the circumferential direction protrudes and extends in the radial direction toward the axial direction thereof so that the first step portion and the second step portion form semicircular step portions.

5. The digital display measuring device according to claim 3, characterized in that: The biasing member is a tubular straight spring whose axis is parallel to the displacement direction of the measuring rod and is arranged outside the measuring rod.

6. The digital display measuring device according to claim 4, characterized in that: The outer wall of the measuring rod is provided with a first fixing rod protruding and extending outward in its radial direction, and the outer peripheral wall of the first fixing rod is provided with a first groove recessed in its radial direction; the inner wall of the shell is provided with a second fixing rod protruding and extending in its radial direction toward its axial direction, and the outer peripheral wall of the second fixing rod is provided with a second groove recessed in its radial direction; one end of the biasing member is fixed in the first groove on the first fixing rod, and the other end is fixed in the second groove on the second fixing rod.

7. The digital display measuring device according to claim 1, characterized in that: The inner wall of the shell is also provided with a guide groove extending along its axial direction and recessed along its radial direction away from its axial center direction, and the outer wall of the measuring rod is provided with a guide slider protruding outward along its radial direction and slidingly cooperating with the guide groove.

8. The digital display measuring device according to any one of claims 1 to 7, characterized in that: The chip assembly is rotatably mounted on the watch frame shell; The inner side of the opening where the cover shell and the watch frame shell meet is provided with a chip cover plate for fixing the chip assembly, and the chip cover plate is provided with a protrusion extending toward the watch frame shell on one side facing the shell, and the protrusion extends along the circumference of the chip cover plate at an angle α, and the α is less than 360°; A positioning piece protruding and extending toward the chip cover plate is provided on the end surface of the watch frame shell facing the chip cover plate, and the chip component can rotate relative to the watch frame shell by an angle of β, and the sum of β and α is 360°. On both sides of the rotation angle range of the chip component relative to the watch frame shell, the positioning piece will interfere with the protrusion.

9. The digital display measuring device according to claim 8, characterized in that: The angle α of the protrusion extending along the circumferential direction is 90°.

10. The digital display measuring device according to claim 8, characterized in that: The circuit board assembly includes a battery and a circuit board, and the battery is electrically connected to the circuit board through a battery electrode thereon; The touch display assembly includes a touch panel and an LCD display screen, the LCD display screen and the circuit board are connected and fixed by double-sided sponge adhesive and the LCD display screen and the circuit board are electrically connected by conductive rubber, and the touch panel is electrically connected to the circuit board by a soft wire; The chip cover is provided with a grounding sheet connected to the battery electrode and a conductive shielding sheet for conducting the chip assembly with the sensor, the grounding sheet and the conductive shielding sheet are fixed together and the other end of the grounding sheet is fixed to the end surface of the chip cover facing the shell, and the other end of the conductive shielding sheet is in contact with the outer wall surface of the shell; A diffuser for diffusing the warning light on the circuit board is also provided on the side of the circuit board facing the touch display component, and the diffuser extends toward the touch panel; The housing is also provided with a detachable battery cover and a data port cover, wherein the battery cover is sealed on one side of the battery, and the data port cover is sealed on one side of the data interface electrically connected to the circuit board.

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