CN218349393U - Contact-type measuring device - Google Patents
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- CN218349393U CN218349393U CN202222657848.4U CN202222657848U CN218349393U CN 218349393 U CN218349393 U CN 218349393U CN 202222657848 U CN202222657848 U CN 202222657848U CN 218349393 U CN218349393 U CN 218349393U
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- 238000005259 measurement Methods 0.000 claims abstract description 56
- 238000005452 bending Methods 0.000 claims abstract description 41
- 125000006850 spacer group Chemical group 0.000 claims description 7
- 230000033001 locomotion Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 description 7
- 230000000087 stabilizing effect Effects 0.000 description 7
- 238000009434 installation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model relates to a contact measuring device for measure the bending deformation volume of product, contact measuring device includes: a controller for electrically connecting with the product; the auxiliary measuring piece is used for being installed on the concave side of the bending deformation part of the product and is electrically connected with the controller; and the measurement execution assembly comprises a stepping motor and a measurement screw rod which is in driving connection with the stepping motor and can move in a telescopic manner, the measurement screw rod is electrically connected with the controller, and the measurement screw rod can push the auxiliary measurement part to move towards the concave side of the bending deformation part so as to enable at least one of the measurement screw rod and the auxiliary measurement part to be in contact with the product. The contact type measuring device can realize automatic measurement of the bending deformation of the product, is time-saving and labor-saving, is high in measuring efficiency, eliminates errors caused by manual measurement, and is high in measuring result precision.
Description
Technical Field
The utility model relates to a deformation measurement technical field especially relates to a contact measuring device.
Background
With the continuous development of science and technology, various intelligent electronic products are widely used in the occasions of work, study, entertainment and the like of people in order to meet the increasing material culture level of people. The shell of the intelligent electronic product is usually formed by assembling a cover plate, a back plate and a frame, the frame is formed by processing sectional materials or plates, then in actual processing, the sectional materials or the plates are easy to bend and deform or the bending amount of the sectional materials or the plates caused by bending exceeds a preset value, and at the moment, the bending deformation amount of the sectional materials or the plates needs to be measured so as to be convenient for correction.
At present, the bending deformation of the section bar or the plate is measured in the following modes: the method comprises the steps that a measuring line is installed on a plate or a section bar which is subjected to bending deformation, and a feeler gauge is manually plugged between the measuring line and the plate or the section bar, so that a bending deformation value is obtained according to the finally adopted feeler gauge. In the actual operation process, the feelers with different thicknesses need to be replaced one by one to test the amount, so that the operation is time-consuming and labor-consuming, and the operation efficiency is low; in addition, when the feeler is plugged in manually, the thin line is easy to vibrate or displace, and the gap value (namely the bending deformation) calculated by judging the thickness of the feeler has larger deviation at the moment, so that the measuring precision is low.
SUMMERY OF THE UTILITY MODEL
Therefore, a need exists for a contact-type measuring device, which aims to solve the problems of time and labor consumption, low efficiency, low measuring precision and the like in the prior art.
In one aspect, the present application provides a contact measurement device for measuring a bending deformation amount of a product, the contact measurement device including:
a controller for electrically connecting with the product;
the auxiliary measuring piece is used for being installed on the concave side of the bending deformation part of the product and is electrically connected with the controller; and
the measurement executing assembly comprises a stepping motor and a measurement screw rod which is in driving connection with the stepping motor and can move in a telescopic mode, the measurement screw rod is electrically connected with the controller, and the measurement screw rod can push the auxiliary measuring piece to move towards the concave side of the bending deformation part, so that at least one of the measurement screw rod and the auxiliary measuring piece is in contact with the product.
The contact type measuring device of the scheme is applied to the working occasions of measuring the bending deformation of products (such as plates, profiles and the like), and the maximum bending deformation or other bending deformation of any size of the products can be measured according to actual needs. When the auxiliary measuring piece is in work, the auxiliary measuring piece is firstly installed to the concave side of the bending deformation part of the product, the auxiliary measuring piece is kept horizontal at the moment, and the distance value between the lower surface of the auxiliary measuring piece and the lowest point of the concave side is the maximum bending deformation value of the product; then the auxiliary measuring piece, the measuring screw and the product are respectively electrically connected with the controller; starting a stepping motor, driving a measuring screw to extend out and contact with an auxiliary measuring piece by the stepping motor, and starting counting by a controller; the measuring screw pushes the auxiliary measuring piece to move close to the concave side of the bending and deforming part of the product until at least one of the measuring screw and the auxiliary measuring piece is in contact with the product, and the controller stops counting; and finally, the controller calculates the number of turns of the measuring screw according to the stepping motor, the number of the rotating steps and the step angle, and then calculates the distance value between the auxiliary measuring piece and the concave side of the product bending part by multiplying the lead of the measuring screw and the number of turns of the rotating steps. Compared with a manual measuring mode of the feeler gauge in the prior art, the contact type measuring device can realize automatic measurement of the bending deformation of the product, is time-saving and labor-saving, has high measuring efficiency, eliminates errors caused by manual measurement, and has high measuring result precision.
The technical solution of the present application is further described below:
in one embodiment, the end surface of the measuring screw facing the auxiliary measuring part is a plane, and the measuring screw pushes the auxiliary measuring part to enable the auxiliary measuring part to be in contact with the product; or
An accommodating groove is formed in the end face, facing the auxiliary measuring piece, of the measuring screw rod in a concave mode, the auxiliary measuring piece is inserted into the accommodating groove and does not exceed a notch of the accommodating groove, and the measuring screw rod is in contact with the product; or
The measuring screw rod is inwards concave towards the end face of the auxiliary measuring piece to form a containing groove, the auxiliary measuring piece is inserted into the containing groove, the outer wall of the auxiliary measuring piece is flush with the groove opening of the containing groove, and the measuring screw rod and the auxiliary measuring piece are in contact with the product.
In one embodiment, the contact measuring device further comprises a gasket, and two ends of the auxiliary measuring member are respectively connected with the gasket, and the gasket is used for being mounted on the product.
In one embodiment, the contact measuring device further comprises a housing, and the controller, the auxiliary measuring unit and the measurement executing assembly are respectively mounted on the housing, and the housing is used for being placed on the surface of the product during measurement.
In one embodiment, the shell comprises at least one supporting leg, the supporting leg is provided with a clearance groove, the supporting leg is used for being abutted against the product, and the auxiliary measuring piece is movably inserted into the clearance groove; the depth direction of the clearance groove is consistent with the telescopic motion direction of the measuring screw rod.
In one embodiment, the contact measurement device further includes a display screen, the display screen is disposed on the housing, and the display screen is electrically connected to the controller; or,
the controller can be in wired or wireless communication connection with an external display device.
In one embodiment, the contact type measuring device further includes a step driver disposed on the housing, and the step driver is electrically connected to the controller and the step motor, respectively.
In one embodiment, the touch measurement device further includes a key sheet disposed on the housing and electrically connected to the controller.
In one embodiment, the contact measurement apparatus further includes an energy supply device disposed on the housing and electrically connected to the controller.
In one embodiment, the contact type measuring device further comprises a voltage stabilizing module, and the voltage stabilizing module is electrically connected with the energy supply device.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is an assembled block diagram of a contact measurement device according to the present application;
fig. 2 is an exploded view of fig. 1.
Description of reference numerals:
100. a contact measurement device; 10. a controller; 20. an auxiliary measuring member; 30. a stepping motor; 40. measuring a screw rod; 50. a gasket; 60. a housing; 61. supporting legs; 611. an empty avoiding groove; 70. a display screen; 80. a step driver; 90. a key sheet; 90a, an energy supply device; 90b, a voltage stabilizing module; 200. producing a product; 210. a bending deformation portion.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
As shown in fig. 1 and 2, a contact measurement apparatus 100 for measuring a bending deformation amount of a product 200 according to an embodiment of the present application is shown, where the contact measurement apparatus 100 includes: a controller 10, an auxiliary measuring member 20, and a measurement execution assembly.
The controller 10 is used for electrically connecting with the product 200; the auxiliary measuring member 20 is used for being installed on the concave side of the bending deformation part 210 of the product 200, and the auxiliary measuring member 20 is electrically connected with the controller 10; the measurement executing assembly comprises a stepping motor 30 and a measurement screw 40 which is in driving connection with the stepping motor 30 and can move in a telescopic manner, the measurement screw 40 is electrically connected with the controller 10, and the measurement screw 40 can push the auxiliary measuring part 20 to move towards the concave side of the bending deformation part 210, so that at least one of the measurement screw 40 and the auxiliary measuring part 20 is in contact with the product 200.
Optionally, the controller 10 is a single chip microcomputer. The single chip microcomputer is reliable to use, simple in working principle and convenient to operate. Of course, in other embodiments, the control may be any one of a PLC, a micro-controller, and the like.
The auxiliary measuring element 20 is a copper wire. Low use cost, easy obtaining and good electric contact performance.
In summary, the implementation of the technical solution of the present embodiment has the following beneficial effects: the contact measuring device 100 according to the above-mentioned aspect is applied to a work field for measuring a bending deformation amount of a product 200 (for example, a plate material, a profile material, etc.), and can specifically measure a maximum bending deformation amount of the product 200 or any other bending deformation amount according to actual needs. In operation, the auxiliary measuring member 20 is first installed to the concave side of the bending deformation portion 210 of the product 200, at this time, the auxiliary measuring member 20 is kept horizontal, and the distance value between the lower surface of the auxiliary measuring member 20 and the lowest point of the concave side is the maximum bending deformation value of the product 200; then, the auxiliary measuring part 20, the measuring screw 40 and the product 200 are respectively electrically connected with the controller 10; immediately after the stepping motor 30 is started, the stepping motor 30 drives the measuring screw 40 to extend out and contact with the auxiliary measuring part 20, and the controller 10 starts counting; the measuring screw 40 pushes the auxiliary measuring member 20 to move close to the concave side of the bending deformation part 210 of the product 200 until at least one of the measuring screw 40 and the auxiliary measuring member 20 contacts the product 200, and the controller 10 stops counting; finally, the controller 10 calculates the number of turns of the measuring screw 40 according to the stepping motor, the number of steps of rotation and the step angle, and then calculates the distance value between the auxiliary measuring member 20 and the concave side of the bending part of the product 200 according to the product of the lead of the measuring screw 40 and the number of turns of rotation, that is, the maximum bending deformation of the product.
Compared with a manual measuring mode of the feeler gauge in the prior art, the contact measuring device 100 of the scheme can realize automatic measurement of the bending deformation of the product 200, is time-saving and labor-saving, has high measuring efficiency, eliminates errors caused by manual measurement, and has high measuring result precision.
Alternatively, the controller 10, the measuring screw 40, the auxiliary measuring member 20 and the product 200 may be connected by wires, or may be connected wirelessly by a wireless communication module. In consideration of cost and convenience of connection operation, the controller 10 is connected to the measuring screw 40, the auxiliary measuring member 20 and the product 200 by wires.
It will be appreciated that when the measuring screw 40 comes into contact with the auxiliary measuring member 20, a first signal is generated, which is transmitted to the controller 10, enabling the controller 10 to start the counting operation. When the measuring screw 40 and/or the auxiliary measuring member 20 comes into contact with the product 200, a second signal is generated and transmitted to the controller 10, so that the controller 10 can stop the counting operation.
In some embodiments, the end surface of the measuring screw 40 facing the auxiliary measuring member 20 is a flat surface, and the measuring screw 40 pushes the auxiliary measuring member 20 so that the auxiliary measuring member 20 is in contact with the product 200. Or, as an alternative to the above embodiment, an end surface of the measuring screw 40 facing the auxiliary measuring member 20 is recessed inwards to form a receiving groove, the auxiliary measuring member 20 is inserted into the receiving groove and does not exceed a notch of the receiving groove, and the measuring screw 40 contacts the product 200. Or, as an alternative to the above embodiment, the end surface of the measuring screw 40 facing the auxiliary measuring member 20 is recessed inwards to form a containing groove, the auxiliary measuring member 20 is inserted into the containing groove, the outer wall of the auxiliary measuring member 20 is flush with the notch of the containing groove, and both the measuring screw 40 and the auxiliary measuring member 20 are in contact with the product 200. Therefore, different structural forms and measuring modes of the contact type measuring device 100 can be flexibly adjusted, requirements of different measuring occasions and requirements are met, and the universality of the equipment is improved.
In order to facilitate the installation and fixation of the auxiliary measuring member 20 and the product 200, in some embodiments, the contact measuring device 100 further includes a spacer 50, two ends of the auxiliary measuring member 20 are respectively connected to the spacer 50, and the spacer 50 is configured to be mounted on the product 200. Specifically, the gasket 50 is adhered and fixed with the product 200 by using an adhesive, so that the installation mode is simple, the implementation cost is low, and the disassembly and the assembly are convenient.
It should be noted that, the two spacers 50 are respectively bonded to two end plane portions of the product 200 close to the bending deformation portion 210, so that the mounted auxiliary measuring device 20 can be suspended right above the bending deformation portion 210, and thus the measured screw 40 can be pushed down better, and the distance value (that is, the bending deformation amount of the product 200) can be detected more accurately.
With reference to fig. 1 and fig. 2, in addition to any of the above embodiments, the contact measuring apparatus 100 further includes a housing 60, the controller 10, the auxiliary measuring device 20, and the measurement executing component are respectively mounted on the housing 60, and the housing 60 is configured to be placed on the surface of the product 200 during the measurement operation. The housing 60 can thus carry the stationary controller 10, the auxiliary measuring device 20 and the measurement performing assembly, so that the contact measuring apparatus 100 has good integrity, compact structure, small size, and is convenient to carry and operate.
The main structure of the housing 60 in this embodiment is a square box, preferably made of metal, and is simple in structure, firm and durable.
Further, the housing 60 includes at least one supporting foot 61, the supporting foot 61 is provided with a clearance groove 611, the supporting foot 61 is used for abutting against the product 200, and the auxiliary measuring part 20 is movably inserted into the clearance groove 611; wherein, the depth direction of the clearance groove 611 is consistent with the telescopic movement direction of the measuring screw 40. Therefore, the clearance groove 611 can be accommodated to avoid the auxiliary measuring member 20 during installation, so as to avoid the supporting foot 61 from interfering with the auxiliary measuring member 20 during installation.
In addition, the depth direction of the clearance groove 611 is consistent with the telescopic movement direction of the auxiliary measuring part 20, so that the auxiliary measuring part 20 can be limited and guided when moving, and the influence on normal measurement work caused by the slippage of the auxiliary measuring part 20 and the measuring screw 40 in a stressed state is prevented.
Preferably, the supporting legs 61 are two and spaced apart from each other, so that the housing 60 can be stably placed on the surface of the product 200. The stepping motor 30 and the measuring screw 40 are located between the two support feet 61.
Referring to fig. 1 and fig. 2, in addition, in some embodiments, the touch measurement apparatus 100 further includes a display screen 70, the display screen 70 is disposed on the housing 60, and the display screen 70 is electrically connected to the controller 10. The measured distance values can be displayed on the display screen 70 in real time for the measuring person to read and record the data.
Alternatively, as an alternative to the above-described embodiment, the controller 10 can be connected in wired or wireless communication with an external display device. The controller 10 can transmit the measured distance value to other external display devices of the measuring staff in real time, such as a mobile phone, a tablet, a notebook computer, etc., so that the measuring staff can receive the measured data under various conditions.
In still other embodiments, the contact measuring apparatus 100 further includes a step driver 80, the step driver 80 is disposed on the housing 60, and the step driver 80 is electrically connected to the controller 10 and the step motor 30 respectively. The stepping driver 80 can flexibly and accurately control parameters such as start and stop, rotation step number, step angle and the like of the stepping motor 30, and meet the requirements of different measurement conditions.
In addition, on the basis of any of the above embodiments, the touch measuring device 100 further includes a key sheet 90, and the key sheet 90 is disposed on the casing 60 and electrically connected to the controller 10. The contact measurement apparatus 100 further includes a power supply device 90a, and the power supply device 90a is disposed on the housing 60 and electrically connected to the controller 10.
Referring to fig. 1 and fig. 2, the contact measuring apparatus 100 further includes a voltage stabilizing module 90b, and the voltage stabilizing module 90b is electrically connected to the energy supply device 90 a. The arranged key board 90 is convenient for the measuring personnel to carry out operation control, instruction input and the like. The energy supply device 90a is specifically a battery, and is used for supplying power to the contact type measuring device 100, so that the device has certain cruising ability. The voltage stabilizing module 90b is used for stabilizing the pressure of the output current, and further helps to improve the motion stability of the stepping motor 30 and the measuring screw 40, so as to improve the measurement accuracy, and avoid the problem that the auxiliary measuring part 20 and the measuring screw 40 are shaken to cause poor contact and unstable signal transmission.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Claims (10)
1. A contact measuring device for measuring a bending deformation amount of a product, comprising:
a controller for electrically connecting with the product;
the auxiliary measuring piece is used for being installed on the concave side of the bending deformation part of the product and is electrically connected with the controller; and
the measurement executing assembly comprises a stepping motor and a measurement screw rod which is in driving connection with the stepping motor and can move in a telescopic mode, the measurement screw rod is electrically connected with the controller, and the measurement screw rod can push the auxiliary measuring piece to move towards the concave side of the bending deformation part, so that at least one of the measurement screw rod and the auxiliary measuring piece is in contact with the product.
2. The contact measuring device according to claim 1, wherein an end surface of the measuring screw facing the auxiliary measuring member is a flat surface, the measuring screw pushing the auxiliary measuring member to bring the auxiliary measuring member into contact with the product; or
An accommodating groove is formed in the end face, facing the auxiliary measuring piece, of the measuring screw rod in a concave mode, the auxiliary measuring piece is inserted into the accommodating groove and does not exceed a notch of the accommodating groove, and the measuring screw rod is in contact with the product; or
The measuring screw rod is inwards concave towards the end face of the auxiliary measuring piece to form a containing groove, the auxiliary measuring piece is inserted into the containing groove, the outer wall of the auxiliary measuring piece is flush with the groove opening of the containing groove, and the measuring screw rod and the auxiliary measuring piece are in contact with the product.
3. The contact measuring device of claim 1, further comprising a spacer, wherein the auxiliary measuring member is coupled to the spacer at both ends thereof, and the spacer is configured to be attached to the product.
4. A contact measuring device according to claim 1, further comprising a housing on which the controller, the auxiliary measuring member and the measurement performing assembly are mounted, respectively, the housing being adapted to be placed on the surface of the product during measurement.
5. The contact type measuring device according to claim 4, wherein the housing comprises at least one supporting leg, the supporting leg is provided with a clearance groove, the supporting leg is used for abutting against the product, and the auxiliary measuring part is movably inserted into the clearance groove; the depth direction of the clearance groove is consistent with the telescopic motion direction of the measuring screw rod.
6. The contact measurement device of claim 4, further comprising a display screen disposed on the housing and electrically connected to the controller; or,
the controller can be in wired or wireless communication connection with an external display device.
7. The contact measurement device of claim 4, further comprising a stepper driver disposed on the housing, wherein the stepper driver is electrically connected to the controller and the stepper motor, respectively.
8. The contact measurement device of claim 4, further comprising a keypad disposed on the housing and electrically connected to the controller.
9. The contact measurement device of claim 4, further comprising an energy supply device disposed on the housing and electrically connected to the controller.
10. The contact measurement device of claim 9, further comprising a voltage regulation module electrically connected to the energy supply device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222657848.4U CN218349393U (en) | 2022-10-10 | 2022-10-10 | Contact-type measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222657848.4U CN218349393U (en) | 2022-10-10 | 2022-10-10 | Contact-type measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218349393U true CN218349393U (en) | 2023-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222657848.4U Active CN218349393U (en) | 2022-10-10 | 2022-10-10 | Contact-type measuring device |
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| CN (1) | CN218349393U (en) |
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2022
- 2022-10-10 CN CN202222657848.4U patent/CN218349393U/en active Active
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