Digital caliper

Abstract

The utility model discloses a digital caliper, and relates to the technical field of calipers. The digital display caliper comprises a main caliper, an auxiliary caliper and a sealing piece. The auxiliary ruler comprises a sliding shell and a circuit board, the sliding shell is slidably arranged on one side of the main ruler, and the circuit board is arranged in the sliding shell; the sealing element is arranged on the side, away from the main ruler, of the circuit board and surrounds the peripheral side of the circuit board, and the side, away from the circuit board, of the sealing element abuts against the sliding shell. According to the digital caliper provided by the invention, signal interference in the use process of the digital caliper can be reduced, and the measurement precision is improved.

Description

Technical Field

[0001] The present application relates to the technical field of calipers, and in particular to a digital caliper. Background Art

[0002] In recent years, digital calipers have been widely used in production work and inspection and testing in the fields of aerospace, shipbuilding, automobile manufacturing, new energy, and machine tool equipment manufacturing.

[0003] However, when the existing digital calipers encounter static electricity or voltage or electromagnetic changes, the signal is easily disturbed, affecting the measurement results. Utility Model Content

[0004] The present application provides a digital caliper to reduce signal interference during the use of the digital caliper and improve measurement accuracy.

[0005] The present application provides a digital caliper, comprising:

[0006] Main ruler;

[0007] The secondary ruler comprises a sliding shell and a circuit board, wherein the sliding shell is slidably arranged on one side of the main ruler, and the circuit board is arranged in the sliding shell;

[0008] The sealing member is arranged on a side of the circuit board away from the main scale and surrounds the peripheral side of the circuit board. The side of the sealing member away from the circuit board abuts against the sliding shell.

[0009] In some possible implementations, the secondary ruler further includes a display, and the display is disposed on a side of the circuit board facing away from the main ruler, and the sealing member is provided with an avoidance hole for the display to pass through.

[0010] In some possible implementations, the seal comprises a silicone seal.

[0011] In some possible implementations, a detection component is disposed between the main ruler and the circuit board, and the detection component is used to detect a moving distance of the secondary ruler relative to the main ruler.

[0012] In some possible implementations, the detection component includes a transmitting grid and a fixed grid, the fixed grid is arranged on the main scale, and the transmitting grid is integrated on the circuit board;

[0013] The circuit board is also integrated with a channel receiving area spaced apart from the transmitting grid, and the spacing distance n between the channel receiving area and the transmitting grid is set to n≥1.5 mm.

[0014] In some possible implementations, a voltage release element is also integrated on the circuit board.

[0015] In some possible implementations, the voltage release element includes a transient voltage suppression diode.

[0016] In some possible implementations, the main ruler includes a ruler body and a first inner diameter measuring jaw and a first outer diameter measuring jaw located at the same end of the ruler body, and the first inner diameter measuring jaw and the first outer diameter measuring jaw are respectively arranged on both sides of the ruler body;

[0017] The secondary ruler also includes a second inner diameter measuring jaw and a second outer diameter measuring jaw;

[0018] The second inner diameter measuring claw is arranged at one end of the sliding shell close to the first inner diameter measuring claw and is arranged opposite to the first inner diameter measuring claw;

[0019] The second outer diameter measuring jaw is disposed at one end of the sliding shell close to the first outer diameter measuring jaw and is opposite to the first outer diameter measuring jaw.

[0020] In some possible implementations, the digital caliper further includes a depth gauge, a side of the main gauge facing away from the circuit board is further provided with a slide groove, the depth gauge is slidably disposed in the slide groove, and the depth gauge is connected to the sliding shell.

[0021] In some possible implementations, a locking screw is further threaded onto the sliding housing, and the locking screw is used to lock and unlock the sliding housing and the main ruler.

[0022] Beneficial effects of the present application: In the digital caliper provided by the present application, the seal is arranged on the device connection side of the circuit board and is arranged around the peripheral side of the circuit board. Therefore, the electronic devices on the circuit board can be wrapped by the seal to form an insulating protection barrier, which can prevent a part of the voltage and electromagnetic from entering the area of the circuit board where the electronic devices are arranged, reduce the influence of external voltage and electromagnetic on the operation of the electronic devices on the circuit board, that is, reduce the interference of external voltage and electromagnetic on the internal signals of the digital caliper, and improve the measurement accuracy of the digital caliper. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 Shows a schematic diagram of the structure of a digital caliper in some embodiments;

[0025] Figure 2 A schematic diagram showing the matching relationship between the sliding shell and the sealing member in some embodiments is shown;

[0026] Figure 3 Shows a schematic diagram of the sliding housing structure in some embodiments;

[0027] Figure 4 Shows a schematic diagram of the structure of the seal in some embodiments;

[0028] Figure 5 Shows a schematic diagram of the regional structure of the circuit board in some embodiments;

[0029] Figure 6 Shows a schematic diagram of the partial circuit structure of the circuit board in some embodiments.

[0030] Description of the main component symbols:

[0031] 1000 - Digital caliper;

[0032] 100 - Main scale; 110 - Scale body; 120 - First inner diameter measuring jaw; 130 - First outer diameter measuring jaw;

[0033] 200 - Sub - scale; 210 - Sliding housing; 212 - Hollow hole; 220 - Circuit board; 221 - Control chip; 222 - Channel receiving area; 223 - Transmitting grid; 224 - Voltage release element; 230 - Second inner diameter measuring jaw; 240 - Second outer diameter measuring jaw; 250 - Display;

[0034] 300 - Seal; 310 - Avoidance hole;

[0035] 400 - Depth gauge;

[0036] 500 - Locking screw. Detailed implementation manners

[0037] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described by referring to the accompanying drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0038] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0039] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0040] In the present application, unless otherwise clearly specified and limited, the terms such as "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0041] In the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0042] As Figure 1 shown, a digital caliper 1000 is provided in the embodiment and can be used to provide a measurement function.

[0043] As Figure 1 、 Figure 2 and Figure 5 shown, the digital caliper 1000 includes a main scale 100, a secondary scale 200 and a seal 300.

[0044] Among them, the auxiliary scale 200 includes a sliding housing 210 and a circuit board 220. The sliding housing 210 is slidably mounted on one side of the main scale 100. A receiving cavity is configured in the sliding housing 210, and the circuit board 220 can be disposed in the receiving cavity of the sliding housing 210. In addition, the circuit board 220 is configured with a device connection side, that is, the side of the circuit board 220 where electronic devices are arranged. The device connection side of the circuit board 220 can be arranged facing away from the main scale 100.

[0045] The seal 300 can also be disposed in the receiving cavity of the sliding housing 210, and the seal 300 can be disposed on the device connection side of the circuit board 220. The seal 300 can be arranged to surround the circumferential side of the circuit board 220 for one week. It can be understood that the seal 300 can be a closed ring structure. The side of the seal 300 facing away from the circuit board 220 can abut against the side of the sliding housing 210 facing the main scale 100.

[0046] In the embodiment of the present application, the seal 300 is disposed on the device connection side of the circuit board 220 and surrounds the circumferential side of the circuit board 220 for one week. Thus, the electronic devices on the circuit board 220 can be surrounded and wrapped by the seal 300 to form an insulating protection barrier, which can provide an obstructive effect on static electricity and electromagnetic fields in the external environment, prevent static electricity and electromagnetic fields from entering the area where the electronic devices are arranged on the circuit board 220, reduce the influence of static electricity and electromagnetic fields on the operation of the electronic devices on the circuit board 220, that is, reduce the interference of static electricity and electromagnetic fields on the internal signals of the digital caliper 1000, and improve the measurement accuracy of the digital caliper 1000.

[0047] As Figure 1 shown, in some embodiments, the main scale 100 may include a scale body 110, a first inner diameter measuring jaw 120, and a first outer diameter measuring jaw 130.

[0048] Among them, the scale body 110 may be in a rod-shaped structure, and a scale may be configured on one side of the scale body 110.

[0049] Along the length direction of the scale body 110, the first inner diameter measuring jaw 120 and the first outer diameter measuring jaw 130 are fixedly arranged at the same end of the scale body 110. And the first inner diameter measuring jaw 120 and the first outer diameter measuring jaw 130 are respectively arranged on both sides of the width direction of the scale body 110.

[0050] As Figures 1 to 3 and Figure 5 shown, the sliding housing 210 is slidably mounted on the side of the scale body 110 where the scale is provided. And the sliding direction of the sliding housing 210 is parallel to the length direction of the scale body 110.

[0051] In some embodiments, the secondary scale 200 further includes a second inner diameter measuring jaw 230 and a second outer diameter measuring jaw 240. Along the sliding direction of the sliding housing 210, the second inner diameter measuring jaw 230 and the second outer diameter measuring jaw 240 can be fixedly arranged at the same end of the sliding housing 210. And the second inner diameter measuring jaw 230 and the second outer diameter measuring jaw 240 are respectively arranged on both sides of the sliding housing 210 in the width direction.

[0052] In an embodiment, the second inner diameter measuring jaw 230 can be arranged opposite to the first inner diameter measuring jaw 120. The first inner diameter measuring jaw 120 can cooperate with the second inner diameter measuring jaw 230 to measure the inner diameter of the object to be measured.

[0053] The second outer diameter measuring jaw 240 can be arranged opposite to the first outer diameter measuring jaw 130. The first outer diameter measuring jaw 130 can cooperate with the second outer diameter measuring jaw 240 to measure the outer diameter of the object to be measured.

[0054] In some embodiments, the seal 300 can include a silicone seal. During assembly, the seal 300 can be first placed in the accommodation cavity of the sliding housing 210, and the seal 300 can be made to fit against the inner wall of the sliding housing 210. Subsequently, the circuit board 220 can be assembled into the sliding housing 210, and the circuit board 220 and the sliding housing 210 can cooperate to clamp the seal 300 to prevent the seal 300 from moving randomly relative to the circuit board 220 and affecting the shielding effect.

[0055] As Figures 1 to 5 shown, in some embodiments, the secondary scale 200 further includes a display 250. The display 250 can also be installed in the accommodation cavity of the sliding housing 210, and the display 250 can be arranged on the side of the circuit board 220 facing away from the main scale 100. In addition, the display 250 can be electrically connected to the circuit board 220, and the display 250 can be used to display the measurement data.

[0056] In an embodiment, the display side of the display 250 can be arranged facing away from the circuit board 220. A hollow hole 212 opposite to the display area in the display 250 can be formed in the sliding housing 210. The display area of the display 250 can be exposed through the hollow hole 212 for an operator to view the display content of the display 250 to obtain the measurement result.

[0057] In an embodiment, an avoidance hole 310 adapted to the display 250 can be configured on the seal 300, and the display 250 can pass through the avoidance hole 310.

[0058] As Figure 1 、 Figure 5 and Figure 6As shown, in some embodiments, a control chip 221 and a transmitting grid 223 are also integrated on the circuit board 220. Among them, the transmitting grid 223 can be a movable grid, and the transmitting grid 223 is electrically connected to the control chip 221. The control chip 221 can include an EC203 chip. Correspondingly, a fixed grid (not shown in the figure) that cooperates with the transmitting grid 223 can be provided on the body 110, and the fixed grid can be arranged corresponding to the scale. In the embodiment, the transmitting grid 223 and the fixed grid can cooperate to form a detection component. It can be understood that the transmitting grid 223 and the fixed grid cooperate to form a linear capacitive grid sensor, which can realize the detection of the moving distance of the secondary scale 200 relative to the main scale 100, that is, the detection of measurement data.

[0059] In some other embodiments, a grating can also be selected as the detection component.

[0060] During the use process, the transmitting grid 223 can cooperate with the fixed grid to detect the measurement data, and the transmitting grid 223 can send the measurement data to the control chip 221, and the control chip 221 controls the display 250 to display the measurement data.

[0061] In addition, a channel receiving area 222 is also configured on the circuit board 220. Among them, the channel receiving area 222 can be arranged at an interval from the transmitting grid 223, and the interval distance n between the channel receiving area 222 and the transmitting grid 223 can be set such that n≥1.5 mm. Thus, the mutual interference between the transmitting grid 223 and the channel receiving area 222 can be reduced. Furthermore, the sensing performance and anti-interference ability of the transmitting grid 223 can also be improved, and the measurement accuracy can be improved.

[0062] Exemplarily, in some embodiments, the interval distance n between the channel receiving area 222 and the transmitting grid 223 can be set to 1.5 mm, 1.65 mm, 1.8 mm, 2.1 mm or any other value greater than 1.5 mm.

[0063] As Figure 6 As shown, in some embodiments, a voltage release element 224 is also integrated on the circuit board 220, which can be used to absorb and discharge voltage and electromagnetic waves to provide protection for other electronic devices on the circuit board 220, such as the control chip 221, etc. In some embodiments, the voltage release element 224 can be a Transient Voltage Suppressor (TVS).

[0064] As Figures 1 to 6As shown, during use, when there is static electricity (or electromagnetic interference) in the environment where the digital caliper 1000 is located, the seal 300 can shield part of the static electricity (or electromagnetic interference). Part of the static electricity (or electromagnetic interference) enters the inside of the secondary scale 200, and the voltage release element 224 can release the static electricity (or electromagnetic interference) entering the inside of the secondary scale 200 through its own resistance discharge. Thus, the control chip 221, the emission grid 223, and other electronic devices inside the secondary scale 200 can be prevented from being affected by static electricity (or electromagnetic interference). Therefore, the anti-static and anti-electromagnetic capabilities of the digital caliper 1000, as well as the anti-interference ability, can be improved, and further the measurement accuracy can be improved.

[0065] As Figure 1 shown, in some embodiments, a locking screw 500 is also screwed onto the sliding shell 210. The locking screw 500 can be used to lock the sliding shell 210 and the body 110, so that the sliding shell 210 and the body 110 remain relatively fixed.

[0066] During the measurement process, the locking screw 500 can be loosened first, so that the sliding shell 210 can be unlocked relative to the body 110 for sliding to measure the object to be measured. When reading the measurement after the measurement, the locking screw 500 can be tightened to keep the sliding shell 210 fixed relative to the body 110, so that the operator can accurately read the measurement result and avoid inaccurate reading caused by the operator's misoperation during the reading process, which may lead to the sliding of the sliding shell 210.

[0067] As Figure 1 shown, the digital caliper 1000 further includes a depth gauge 400. In some embodiments, a chute may be formed on the side of the body 110 facing away from the circuit board 220. The chute may extend along the length direction of the body 110 and extend to one end of the body 110 away from the first inner diameter jaw 120 to communicate with the outside. The depth gauge 400 can be slidably disposed in the chute and can be telescopically disposed relative to one end of the body 110 away from the first inner diameter jaw 120.

[0068] In the embodiment, the depth gauge 400 can be fixedly connected to the sliding shell 210. Thus, when the sliding shell 210 slides along the body 110, the depth gauge 400 can be driven to slide synchronously to measure the depth in the object to be measured.

[0069] In addition, a cover plate (not shown in the figure) may be connected to the side of the sliding shell 210 away from the display side of the display 250 by welding, screw connection, etc., to close this side of the sliding shell 210.

[0070] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0071] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A digital caliper, characterized in that, Comprising: Main scale; Auxiliary scale, including a sliding housing and a circuit board, the sliding housing is slidably disposed on one side of the main scale, and the circuit board is disposed in the sliding housing; Seal, disposed on the side of the circuit board facing away from the main scale and surrounding the circumference of the circuit board, and the side of the seal facing away from the circuit board abuts against the sliding housing.

2. The digital caliper according to claim 1, characterized in that, The auxiliary scale further includes a display, the display is disposed on the side of the circuit board facing away from the main scale, and an avoidance hole for the display to pass through is configured in the seal.

3. The digital caliper according to claim 1 or 2, characterized in that, The seal includes a silicone seal.

4. The digital caliper according to claim 1, characterized in that, A detection component is disposed between the main scale and the circuit board, and the detection component is used to detect the moving distance of the auxiliary scale relative to the main scale.

5. The digital caliper according to claim 4, characterized in that, The detection component includes a transmitting grating and a stationary grating, the stationary grating is disposed on the main scale, and the transmitting grating is integrated on the circuit board; A channel receiving area spaced from the transmitting grating is also integrated on the circuit board, and the spacing distance n between the channel receiving area and the transmitting grating is set to n≥1.5mm.

6. The digital caliper according to claim 1, wherein A voltage releasing element is also integrated on the circuit board.

7. The digital caliper according to claim 6, characterized in that, The voltage releasing element includes a transient voltage suppression diode.

8. The digital caliper according to claim 1 or 2, characterized in that, The main scale includes a scale body and a first inner diameter measuring jaw and a first outer diameter measuring jaw at the same end of the scale body, and the first inner diameter measuring jaw and the first outer diameter measuring jaw are respectively disposed on both sides of the scale body; The auxiliary scale further includes a second inner diameter measuring jaw and a second outer diameter measuring jaw; The second inner diameter measuring jaw is placed at one end of the sliding housing close to the first inner diameter measuring jaw and is disposed opposite to the first inner diameter measuring jaw; The second outer diameter measuring jaw is disposed at one end of the sliding housing close to the first outer diameter measuring jaw and is opposite to the first outer diameter measuring jaw.

9. The digital caliper according to claim 1, characterized in that, The digital caliper further includes a depth scale, a chute is further configured on the side of the main scale facing away from the circuit board, the depth scale is slidably disposed in the chute, and the depth scale is connected to the sliding housing.

10. The digital caliper according to claim 1, characterized in that, A locking screw is also screwed on the sliding housing, and the locking screw is used to lock and unlock the sliding housing and the main scale.

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