CN210833575U - Intelligent watch compass function testing equipment - Google Patents

Intelligent watch compass function testing equipment Download PDF

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Publication number
CN210833575U
CN210833575U CN201921888327.1U CN201921888327U CN210833575U CN 210833575 U CN210833575 U CN 210833575U CN 201921888327 U CN201921888327 U CN 201921888327U CN 210833575 U CN210833575 U CN 210833575U
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carrier
magnetic field
test
compass
box
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CN201921888327.1U
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Chinese (zh)
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欧阳承志
艾灿
吕斌
许新生
周权江
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World Precision Manufacturing Dongguan Co Ltd
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World Precision Manufacturing Dongguan Co Ltd
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Abstract

The utility model discloses an intelligent watch compass function test device, which comprises a shielding box, a test box and an electric cabinet which are sealed in the shielding box, an upper coil, a lower coil and a carrier which are arranged in the test box, and an electric control device which is arranged in the electric cabinet, the electric control device is electrically connected with the upper coil, the lower coil and the carrier, a simulation magnetic field can be formed between the upper coil and the lower coil after the electric control device is electrified, the carrier is obliquely arranged in the test box, so that the induction center of the electronic compass clamped in the carrier is positioned at the central position of the simulated magnetic field, the magnetic field direction of the analog magnetic field changes with the change of the current direction in the upper coil and the lower coil, thereby realizing the test of the indicating function of the electronic compass in the north-south magnetic field simulated by the simulated magnetic field. The device has simple structure, is convenient to use and effectively improves the test accuracy.

Description

Intelligent watch compass function testing equipment
Technical Field
The utility model relates to a test equipment especially relates to an intelligence wrist-watch compass function test equipment.
Background
With the continuous development of science and technology, electronic compasses are widely used in mobile phones, tablet computers, GPS, game consoles, watches, and other intelligent mobile electronic devices. The electronic compass is generally formed by integrating a magnetic induction part and a processing circuit, the manufacturing process is quite complex, hundreds of processing steps are involved, and the performance of the electronic compass can be affected by the non-specification of any one process. In practical use, a compass of the mobile electronic device needs to accurately sense a magnetic field direction and an intensity signal of a specific position, and particularly, whether the performance of the electronic compass applied to the smart watch is excellent is important, and whether the indicating function of the electronic compass is normal or not is often related to personal safety of a user in outdoor sports and field environments.
Therefore, after the smart watch with the compass function is assembled, parameter testing and calibration, such as zero offset, sensitivity and the like, must be performed one by one before the smart watch leaves a factory to ensure that products with consistent performance are obtained, and thus, the outflow of products with poor functions is avoided. When current carry out compass function test to intelligent wrist-watch, it sets up multiunit simulation magnetic field to correspond along the direction of X, Y, Z three axles mostly, through removing the electronic compass that awaits measuring in order to realize corresponding test in the magnetic field that corresponds, the structure of equipment is complicated relatively, and efficiency of software testing is lower a little relatively, and the motor that just drives usefulness has certain interference to magnetic field to the stability and the degree of accuracy of test have been influenced.
Therefore, there is a need for a smart watch compass function testing apparatus with simple structure, high testing efficiency and high testing accuracy to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a simple structure, high and the high intelligent wrist-watch compass functional test equipment of degree of accuracy of test of efficiency of software testing to the realization detects the instruction function of the electronic compass of intelligent wrist-watch.
In order to achieve the above object, the present invention discloses an intelligent watch compass function testing device, for testing the indication function of an electronic compass of an intelligent watch, the intelligent watch compass function testing device comprises a shielding box, a testing box and an electric cabinet enclosed in the shielding box, an upper coil, a lower coil and a carrier installed in the testing box, and an electric control device installed in the electric cabinet, the electric control device is electrically connected with the upper coil, the lower coil and the carrier, a simulated magnetic field can be formed between the upper coil and the lower coil after being electrified, the carrier is obliquely arranged in the testing box, so that the induction center of the electronic compass clamped in the carrier is located at the center position of the simulated magnetic field, the magnetic field direction of the simulated magnetic field changes along with the change of the current direction in the upper coil and the lower coil, thereby realizing the test of the indicating function of the electronic compass in the north-south magnetic field simulated by the simulated magnetic field.
Preferably, the included angles between the electronic compass and the X-axis, the Y-axis and the Z-axis in the simulated magnetic field are all the same, and the included angle is 54.74 °.
Preferably, the upper coil and the lower coil are arranged in parallel and spaced in the test box, and both are rectangular or circular in shape.
Preferably, the test box and the electric cabinet are of an integrated structure, and the test box and the electric cabinet are separated by a partition plate.
Preferably, a support frame and a carrier plate are arranged in the test box, the support frame is fixedly arranged on the inner wall of the test box, an inclined part is convexly arranged towards the direction close to the simulated magnetic field, the carrier plate is arranged on the inclined part, and the carrier is clamped on the carrier plate.
Preferably, the carrier is detachably clamped on the carrier plate.
Preferably, the carrier has a slot corresponding to the outer contour of the carrier, the slot has a test circuit board therein, and the edge of the slot has a positioning column and a positioning block for positioning.
Preferably, the carrier is provided with a locking component, and the locking component can rotate or move relative to the slot, so that the upper end of the carrier is pressed against the slot.
Preferably, the carrier includes a contour groove, a switching circuit board disposed in the contour groove, and a fastening component, the electronic compass is disposed in the contour groove and can be electrically connected to the switching circuit board, and the fastening component is rotatably or movably disposed beside the contour groove for fastening the electronic compass in the contour groove.
Preferably, the fastening assembly includes a cover plate, a pre-pressing block and a buckle, the buckle is disposed at the left side end or/and the right side end of the contour groove, the pre-pressing block is disposed at the front side end of the contour groove in a vertically floating or rotatable manner, the cover plate is disposed at the upper side of the pre-pressing block, the cover plate is provided with a pressing portion corresponding to the pre-pressing block and a hook corresponding to the buckle, the cover plate can rotate or move up and down relative to the contour groove, so that the pressing portion drives the pre-pressing block to move or rotate up and down along with the pressing portion until the hook is driven by the cover plate to move or rotate to be fastened with the buckle, thereby fastening the electronic compass in the contour groove.
Compared with the prior art, the utility model provides an intelligence wrist-watch compass functional test equipment's test box and electric cabinet seal in the shielded cell, and upward coil, lower coil and carrier are installed in the test box, and the simulation magnetic field that forms after the circular telegram by last coil and lower coil can not reveal easily through test box and shielded cell dual shielding, has effectively guaranteed the stability and the degree of accuracy of test. And the electric control device is arranged in the electric control box, so that the electric control device and the simulation magnetic field are arranged in a separated manner, the problem that the electric control device is magnetized to cause interference on a test result is reduced, and the test accuracy is effectively improved. Furthermore, the carrier is obliquely arranged in the test box, so that the induction center of the electronic compass clamped in the carrier is positioned at the central position of the simulated magnetic field, during testing, the electronic compass to be tested is fixed, and only the direction of the current of the two coils needs to be changed to change the direction of the magnetic field of the simulated magnetic field, so that different magnetic field environments are simulated, and the indication test of the electronic compass in the simulated north-south magnetic field environment can be realized. The utility model provides an intelligence wrist-watch compass functional test equipment's simple structure and test are accurate, have effectively improved efficiency of software testing.
Drawings
Fig. 1 is the utility model discloses intelligence wrist-watch compass function test equipment's spatial structure sketch map.
Figure 2 is the utility model discloses the side view of partial subassembly has been hidden to intelligence wrist-watch compass function test equipment.
Fig. 3 is a perspective view of the internal structure of the intelligent watch compass function testing device.
Figure 4 is the utility model discloses intelligence wrist-watch compass functional test equipment's inner structure's plan view.
Fig. 5 is a schematic perspective view of a carrier plate according to the present invention.
Fig. 6 is a schematic plan view of the carrier plate of the present invention.
Fig. 7 is a schematic perspective view of the carrier of the present invention with the cover plate not locked.
Fig. 8 is a schematic perspective view of an angle of the carrier according to the present invention.
Fig. 9 is a schematic perspective view of another angle of the carrier according to the present invention.
Fig. 10 is a schematic plan view of the carrier of the present invention.
Detailed Description
In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.
Referring to fig. 1 to 10, the present invention provides a compass function testing device 100 for a smart watch, which is used for testing the indication function of an electronic compass 200 of the smart watch. As shown in fig. 8, the electronic compass 200 of the present invention includes a highly integrated flexible circuit board 201 and a sensor 202 integrated on the flexible circuit board 201 and used for magnetic induction. The utility model discloses an intelligence wrist-watch compass function test equipment 100 specifically includes shielded cell 10, seals in shielded cell 10 inside test box 20 and electric cabinet 30, installs last coil (not shown in the figure), lower coil 40 and carrier 50 in test box 20 to and install the electrically controlled device 60 in electric cabinet 30. A simulated magnetic field can be formed between the upper coil and the lower coil 40 after the power is turned on, the simulated magnetic field corresponds to the earth magnetic field, the electronic compass 200 is clamped in the carrier 50, and the carrier 50 is obliquely arranged in the test box 20, so that the induction center of the sensor 202 of the electronic compass 200 is located at the center of the simulated magnetic field, and the included angles between the electronic compass 200 and the X-axis, the Y-axis and the Z-axis in the simulated magnetic field are all the same, and the included angle is 54.74 °. It should be noted that directions of the X axis, the Y axis and the Z axis are shown in fig. 2 and fig. 3, the Y axis may specifically correspond to a direction of a long side of a carrier board 80 in the test box 20, the X axis corresponds to a direction of a short side of the carrier board 80, the Z axis is a direction perpendicular to the X axis and the Y axis, and specific structures and functions of the carrier board 80 will be described in detail below. The electronic control device 60 is electrically connected to the upper coil, the lower coil 40 and the carrier 50 to control the coordination among the upper coil, the lower coil 40 and the carrier 50, and the magnetic field direction of the simulated magnetic field can be changed along with the change of the current direction in the upper coil and the lower coil 40, thereby realizing the test of the indication function of the electronic compass 200 in the north-south magnetic field simulated by the simulated magnetic field.
Specifically, the electronic control device 60 is electrically connected to a detection device (not shown) disposed outside the shielding box 10, the electronic control device 60 can control the current of the upper coil and the lower coil 40 to generate a predetermined standard magnetic field value, and then change the current direction of the upper coil and the lower coil 40 to change the direction of the simulated magnetic field to simulate the north-south magnetic field environment required by the test, the electronic compass 200 is electrically connected to the electronic control device 60 via the carrier 50 to measure the north magnetic field measured value and the south magnetic field measured value according to the instruction sent by the test software, and then determine whether the north magnetic field measured value and the south magnetic field measured value are within the theoretical range, thereby determining whether the indication function of the electronic compass 200 is normal.
The structure and function of the shielding 10, the test box 20 and the electric control box 30 will be described with reference to fig. 1 to 4:
the shielding box 10 is square, an entrance for the electronic compass 200 to be loaded and unloaded is arranged on the front side wall of the shielding box 10, the shielding box 10 includes a shielding cover 11, and the shielding cover 11 is rotatably buckled on the box body of the shielding box 10 to seal the entrance. The shielding box 10 is further provided with operation keys for controlling the operation of the whole device, an indicator light 12 for displaying the operating state of the device, and a connection terminal (not shown) for electrically connecting an external detection device and/or a power supply.
The test box 20 and the electric control box 30 are disposed in the shielding box 10 in a front-back adjacent manner, the upper coil and the lower coil 40 are disposed in the test box 20 in a vertically parallel and spaced manner, i.e., along the Z-axis direction, and the upper coil is specifically disposed at a position shown by a dotted line a in fig. 3. Specifically, the distance between the upper coil and the lower coil 40 is 300-.
Because the simulated magnetic field formed by the upper coil and the lower coil 40 after being electrified is positioned in the test box 20, the simulated magnetic field cannot be easily leaked through double shielding of the test box 20 and the shielding box 10, and the accuracy of the test result is effectively improved. Moreover, the test box 20 and the electric control box 30 are separately arranged, so that the electric control device 60 can be effectively prevented from being interfered by the simulated magnetic field, and the normal operation of the electric control device 60 can be further ensured.
Preferably, the test box 20 and the electric control box 30 are of an integrated structure, and are separated by a partition plate. The shielding box 10 is made of permalloy, has a good shielding effect, can shield the influence of the outside on a simulated magnetic field, and ensures the testing environment. The integrated test box 20 and the electric control box 30 are mainly made of bakelite, so that the test result is prevented from being interfered by magnetization when other materials are used.
Referring to fig. 2 to 4, the testing box 20 is provided with a supporting frame 70 and a carrier plate 80, the supporting frame 70 is fixed on the inner wall of the testing box 20, and a tilted portion 71 is protruded toward the direction of the simulated magnetic field, the supporting frame 70 further has a plate-shaped portion 72 connected with the tilted portion 71, and the plate-shaped portion 72 is rectangular and is obliquely fixed on the inner wall of the testing box 20. The carrier plate 80 is mounted on the inclined portion 71 of the supporting frame 70, and the carrier 50 is clamped on the carrier plate 80 and electrically connected to the carrier plate 80 through the probe assembly, so as to ensure that the sensor 202 of the electronic compass 200 is arranged at the center of the upper coil and the lower coil 40 at a certain angle, and the sensing center of the sensor 202 coincides with the center of the two coils. Preferably, the carrier plate 80 is connected to the supporting frame 70 by plastic screws, so as to reduce interference. The carrier 50 is detachably clamped on the carrier plate 80, and at least two carriers 50 can be provided, and the at least two carriers 50 can be alternatively clamped on the carrier plate 80, so that the operation time of loading and unloading is saved, and the working efficiency is effectively improved.
Referring to fig. 5 to 7, the structure of the carrier 80 will be described in detail:
in order to fix the carrier 50, the carrier 80 has a slot 80a, the shape of the slot 80a corresponds to the shape of the outer contour of the carrier 50, a test circuit board 81 (see fig. 3) is disposed in the slot 80a, and the test circuit board 81 is used for electrically connecting the carrier 50 and the electronic control device 60. The edge of the slot 80a is provided with a positioning column 82 and a positioning block 83 for positioning, so as to limit the movement of the carrier 50 on the carrier plate 80 relative to the X-axis direction and the Y-axis direction, thereby ensuring the stability and accuracy of the test value.
Specifically, the positioning column 82 is a plastic pin, and the number thereof is a plurality of, and the positioning block 83 is a plastic block, and the number thereof is also a plurality of, thereby fixing the carrier 50 by different positions, and the fixation is firmer. In this embodiment, the slot 80a is substantially rectangular, two adjacent edges of the slot 80a are respectively provided with at least one positioning block 83, the other two adjacent edges of the slot 80a are respectively provided with at least one positioning column 82, and the edge of the carrier 50 is provided with a clamping notch 51 corresponding to the positioning column 82, so that the carrier 50 is fixed by the clamping fit of the positioning column 82 and the clamping notch 51 and the limiting fit of the positioning block 83 at the corner.
Furthermore, a buckling component 84 is further disposed on the carrier plate 80, and the buckling component 84 can rotate or move relative to the slot 80a, and the carrier 50 in the slot 80a is pressed by the upper end, so as to limit the movement of the carrier 50 on the carrier plate 80 relative to the Z-axis direction, thereby further improving the stability and accuracy of the test value. Specifically, the pressing assembly 84 includes a pressing plate 841, a pivoting seat 842, a clamping seat 843 and a pressing head 844, the pivoting seat 842 and the clamping seat 843 are respectively disposed on two opposite sides of the clamping groove 80a along the transverse width direction of the clamping groove 80a, and the pivoting seat 842 and the clamping seat 843 are disposed in a flush manner. An avoidance opening 8411 is formed at the opposite center of the pressing plate 841, so that the electronic compass 200 in the carrier 50 can be exposed, at least one pressing head 844 is arranged at the edge of the avoidance opening 8411, and correspondingly, a plug-in hole 52 (see fig. 8) corresponding to the pressing head 844 is arranged at the top end of the carrier 50.
Specifically, in the present embodiment, one end of the pressing plate 841 is pivoted on the pivoting seat 842, the other end of the pressing plate 841 can rotate around the pivoting seat 842 to be clamped with the clamping seat 843, specifically, the pressing plate 841 is clamped with the clamping seat 843 through the locking buckle 845 installed on the clamping seat 843, and when the pressing plate 841 is clamped on the clamping seat 843, the pressing head 844 is correspondingly inserted into the insertion hole 52, so as to fix the carrier 50. Of course, one end of the pressing plate 841 can be movably installed on the pivoting seat 842, the other end of the pressing plate 841 is suspended, the pressing plate 841 can relatively move on the pivoting seat 842 until the suspended end thereof is clamped with the clamping seat 843, and the purpose of fixing the carrier 50 can also be achieved. Preferably, a resilient member is connected between ram 844 and pressure plate 841 so that a flexible press fit of carrier 50 is achieved.
Referring to fig. 8 to 10, the structure of carrier 50 will be described in detail:
the carrier 50 includes a contour groove 50a, a transferring circuit board 53 disposed in the contour groove 50a, and a fastening component 54, the contour groove 50a corresponds to the shape of the electronic compass 200, the electronic compass 200 is disposed in the contour groove 50a and can be electrically connected to the transferring circuit board 53 through a probe assembly, the transferring circuit board 53 can be electrically connected to the testing circuit board 81, and the fastening component 54 is rotatably or movably disposed beside the contour groove 50a, so as to fasten the electronic compass 200 in the contour groove 50 a.
Specifically, the fastening assembly 54 includes a cover 541, a pre-pressing block 542 and a latch 543, wherein the latch 543 is disposed at a left side end and/or a right side end of the contour groove 50a along a transverse width direction of the contour groove 50a, the pre-pressing block 542 is disposed at a front side end of the contour groove 50a in a vertically floating manner or a rotatable manner, the cover 541 is disposed at an upper side of the pre-pressing block 542, and the cover 541 is provided with a pressing portion 5411 corresponding to the pre-pressing block 542 and a hook 5412 corresponding to the latch 543. After the electronic compass 200 to be tested is placed in the contour groove 50a, the cover 541 is operated to rotate or move up and down relative to the contour groove 50a, so that the pressing portion 5411 drives the pre-pressing block 542 to move up and down or rotate, the moved or rotated pre-pressing block 542 presses against the flexible circuit board 201 of the electronic compass 200 until the hook 5412 is driven by the cover 541 to move or rotate to be fastened with the buckle 543, the cover 541 is locked at the pressing position, the electronic compass 200 is also fastened in the contour groove 50a, and the sensor 202 can still be exposed.
With reference to fig. 1 to fig. 10, the present invention provides a detailed description of the working process of the intelligent watch compass function testing apparatus 100:
firstly, an electronic compass 200 to be tested is loaded and fixed in a carrier 50, the carrier 50 loaded with the electronic compass 200 is clamped on a carrier plate 80, and a shielding cover 11 is closed to seal a shielding box 10; then, starting the device, and controlling the current of the upper coil and the lower coil through the electric control device 60 to generate a preset standard magnetic field value; changing the direction of the current of the two coils to change the magnetic field direction of the simulated magnetic field so as to simulate different magnetic field environments, and then measuring the north magnetic field measured value and the south magnetic field measured value of the electronic compass in the simulated magnetic field environments through instructions sent by the testing software; finally, whether the measured north magnetic field value and the measured south magnetic field value are within the theoretical range value is judged, so that whether the indicating function of the electronic compass 200 is normal is determined.
Compared with the prior art, the utility model provides an intelligence wrist-watch compass function test equipment 100's test box 20 and electric cabinet 30 seal in shielded cell 10, and upward coil, lower coil 40 and carrier 50 are installed in test box 20, and the simulation magnetic field can not reveal easily through test box 20 and shielded cell 10 dual shielding, has effectively guaranteed the stability and the degree of accuracy of test. Moreover, the electric control device 60 is installed in the electric cabinet 30, so that the electric control device 60 and the simulated magnetic field are separately arranged, the problem that the electric control device 60 is magnetized to cause interference to a test result can be effectively reduced, and the test accuracy is further improved. Furthermore, the carrier 50 is disposed in the testing box 20 in an inclined manner, so that the sensing center of the electronic compass 200 clamped in the carrier 50 is located at the center of the simulated magnetic field, and during testing, the electronic compass 200 to be tested is fixed, and only the direction of the current in the two coils needs to be changed to change the magnetic field direction of the simulated magnetic field, so as to simulate different magnetic field environments, thereby realizing the indication test of the electronic compass 200 in the simulated north-south magnetic field environment. The utility model provides an intelligence wrist-watch compass function test equipment 100 simple structure and test are accurate, have effectively improved efficiency of software testing.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, therefore, the invention is not limited thereto.

Claims (10)

1. A compass function test device of an intelligent watch is used for testing the indication function of an electronic compass of the intelligent watch and is characterized by comprising a shielding box, a test box and an electric cabinet which are sealed in the shielding box, an upper coil, a lower coil and a carrier which are arranged in the test box and an electric control device which is arranged in the electric cabinet, wherein the electric control device is electrically connected with the upper coil, the lower coil and the carrier, a simulated magnetic field can be formed between the upper coil and the lower coil after the electric control device is electrified, the carrier is obliquely arranged in the test box, so that the induction center of the electronic compass which is clamped in the carrier is positioned at the central position of the simulated magnetic field, and the magnetic field direction of the simulated magnetic field is changed along with the change of the current direction in the upper coil and the lower coil, thereby realizing the test of the indicating function of the electronic compass in the north-south magnetic field simulated by the simulated magnetic field.
2. The smart watch compass function test apparatus as claimed in claim 1, wherein the electronic compass is positioned at the same angle to the X-axis, the Y-axis and the Z-axis in the simulated magnetic field, and the angle is 54.74 °.
3. The smart watch compass function test device of claim 1, wherein the upper coil and the lower coil are in a parallel and spaced apart arrangement in the test case and are rectangular or circular in shape.
4. The device of claim 1 wherein the test box and the electrical control box are of a one-piece construction separated by a partition.
5. The device for testing compass function of smart watch of claim 1, wherein said test box has a supporting frame and a carrier board, said supporting frame is fixed on the inner wall of said test box and has an inclined portion protruding toward the direction close to said simulated magnetic field, said carrier board is mounted on said inclined portion, and said carrier board is fastened on said carrier board.
6. The device for testing compass function of a smart watch of claim 5, wherein said carrier is removably snapped onto said carrier.
7. The device for testing compass function of an intelligent watch of claim 5, wherein said carrier board has a slot, said slot has a test circuit board disposed therein, and a positioning column and a positioning block are disposed at an edge of said slot.
8. The apparatus of claim 7 wherein the carrier further comprises a latch assembly, the latch assembly being rotatable or movable relative to the slot to hold the carrier in the slot by an upper end of the latch assembly.
9. The apparatus for testing compass function of a smart watch of claim 1, wherein said carriage comprises a contour groove, a switching circuit board disposed in said contour groove, and a fastening assembly, said electronic compass being disposed in said contour groove and electrically connected to said switching circuit board, said fastening assembly being rotatably or movably disposed beside said contour groove for fastening said electronic compass in said contour groove.
10. The device for testing compass function of smart watch of claim 9, wherein said fastening assembly comprises a cover plate, a pre-pressing block and a buckle, said buckle is disposed at the left side end or/and the right side end of said contour groove, said pre-pressing block is disposed at the front side end of said contour groove in a vertically floating or rotatable manner, said cover plate is disposed at the upper side of said pre-pressing block, said cover plate is provided with a pressing portion corresponding to said pre-pressing block and a hook corresponding to said buckle, said cover plate can rotate or move up and down relative to said contour groove, so that said pressing portion drives said pre-pressing block to move up and down or rotate along with said cover plate until said hook is driven by said cover plate to move or rotate to be fastened with said buckle, thereby fastening said electronic compass in said contour groove.
CN201921888327.1U 2019-11-04 2019-11-04 Intelligent watch compass function testing equipment Active CN210833575U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921888327.1U CN210833575U (en) 2019-11-04 2019-11-04 Intelligent watch compass function testing equipment

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Application Number Priority Date Filing Date Title
CN201921888327.1U CN210833575U (en) 2019-11-04 2019-11-04 Intelligent watch compass function testing equipment

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CN210833575U true CN210833575U (en) 2020-06-23

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110763218A (en) * 2019-11-04 2020-02-07 东莞市沃德精密机械有限公司 Intelligent watch compass function testing equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110763218A (en) * 2019-11-04 2020-02-07 东莞市沃德精密机械有限公司 Intelligent watch compass function testing equipment

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