CN112881954B - Magnetism detection device - Google Patents
Magnetism detection device Download PDFInfo
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- CN112881954B CN112881954B CN202110035378.5A CN202110035378A CN112881954B CN 112881954 B CN112881954 B CN 112881954B CN 202110035378 A CN202110035378 A CN 202110035378A CN 112881954 B CN112881954 B CN 112881954B
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- 238000001514 detection method Methods 0.000 title claims abstract description 114
- 230000005389 magnetism Effects 0.000 title claims description 3
- 230000000694 effects Effects 0.000 claims description 17
- 230000001960 triggered effect Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 8
- 230000002159 abnormal effect Effects 0.000 description 7
- 238000013016 damping Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
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- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The invention provides a magnetic detection device for detecting the magnetic pole direction of a workpiece to be detected, which comprises a base, a plurality of magnetic detection blocks and a cover plate movably covered on the base, wherein the base is provided with a plurality of magnetic detection blocks; the base is provided with a circular groove for placing a workpiece to be detected, and a plurality of first accommodating grooves for placing magnetic detection blocks are uniformly formed in the circular groove; the cover plate comprises a main body part, a rotary handle arranged on the main body part and far from one side of the circular groove, and a baffle plate arranged on the main body part and near one side of the circular groove, wherein the baffle plate presses a workpiece to be detected into the magnetic detection block when the rotary handle rotates, and the magnetic detection block detects the magnetic pole direction of the workpiece to be detected; the magnetic detection block is electrically connected with the alarm module, and the alarm module gives an alarm when the direction of the magnetic pole of the magnet in the workpiece to be detected is wrong. By using the magnetic detection block, whether the magnet in the workpiece is assembled correctly or not can be detected rapidly, and the magnet can be positioned accurately to be assembled incorrectly through the alarm module.
Description
Technical Field
The invention relates to the technical field of magnetic detection, in particular to a magnetic detection device.
Background
Currently, most electronic devices are equipped with magnets for use in applications such as magnetic charging, magnetic fixing, and detecting whether to cover. However, as the electronic devices described above are miniaturized, magnets mounted on the electronic devices are also becoming smaller, and there are cases where mounting errors of magnetic poles and the like are likely to occur during the mounting process. In addition, since the volume of the work on which the magnet is mounted is also small, it is difficult to recognize that the magnet is erroneously mounted or the like before the work is mounted on the electronic apparatus. Therefore, there is a need for a device that can quickly detect whether the poles of a magnet assembled in a smaller workpiece are improperly installed.
Disclosure of Invention
In view of this, the present invention provides a magnetic detection device for detecting whether or not a magnet is assembled correctly through a magnetic path.
In a first aspect of the present invention, the magnetic detection device is used for detecting a magnetic pole direction of a workpiece to be detected, and the magnetic detection device includes a base, a plurality of magnetic detection blocks, and a cover plate movably covered on the base; the base is provided with a circular groove for placing a workpiece to be detected, and the circular groove is uniformly provided with a plurality of first accommodating grooves for placing magnetic detection blocks; the cover plate comprises a main body part, a rotary handle arranged on the main body part and far from one side of the circular groove, and a baffle plate arranged on the main body part and near one side of the circular groove, wherein the baffle plate is connected with the rotary handle, the baffle plate presses the workpiece to be detected into the magnetic detection block when the rotary handle rotates, and the magnetic detection block detects the magnetic pole direction of the workpiece to be detected;
the magnetic detection block is electrically connected with an alarm module arranged on the base, and the alarm module gives an alarm when the direction of the magnetic pole of the magnet in the workpiece to be detected is wrong.
In one implementation form of the first aspect of the invention, the magnetic detection block is provided with a caliper, which is loosely coupled to the baffle.
In an implementation manner of the first aspect of the present invention, the number of the magnetic detection blocks is the same as the number of the magnets in the workpiece to be detected.
In an implementation manner of the first aspect of the present invention, when the workpiece to be detected is loaded into the circular groove, positions of the magnets in the workpiece to be detected are in one-to-one correspondence with positions of the magnetic detection blocks.
In an implementation manner of the first aspect of the present invention, a magnetic detection mechanism is disposed on a side of the magnetic detection block facing the direction of the cover plate, and a connection seat for outputting an electrical signal is disposed on a side of the magnetic detection block facing away from the direction of the cover plate, where the magnetic detection mechanism includes any one of a magnetoresistance effect element, a giant magnetoresistance effect element, and a tunnel magnetoresistance effect element.
In an implementation manner of the first aspect of the present invention, each of the magnetic detection blocks is provided with a corresponding indicator light in the alarm module.
In an implementation manner of the first aspect of the present invention, a first micro switch is provided on the base, and the first micro switch is triggered when the cover plate is covered, and is used for detecting whether the cover plate is covered correctly.
In one implementation manner of the first aspect of the present invention, the cover plate has a second micro switch provided on an outer peripheral portion of the main body portion, and the second micro switch is capable of contacting the shutter.
In an implementation manner of the first aspect of the present invention, a concave protection groove is disposed in the center of the base, and the protection groove is used for accommodating a portion of the workpiece to be detected, which is not correctly placed in the circular groove, when the cover plate covers the base.
In one implementation manner of the first aspect of the present invention, the cover plate has a tab that is in snap-fit with the base, and the tab is used to fasten the cover plate to the base and prevent the workpiece to be detected from falling out of the circular groove.
The magnetic detection device provided by the invention has the beneficial effects that: by using the magnetic detection block in the magnetic detection device, whether the magnetic poles of the magnets installed in the workpiece are correctly assembled can be detected rapidly, so that the manual burden is reduced, and the magnet assembly error can be accurately positioned through the alarm module.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an exploded view of a magnetic sensing device according to the present invention;
FIG. 2 is a front view of a magnetic detection device according to the present invention;
FIG. 3 is a schematic diagram of a base of the magnetic detection device according to the present invention;
FIG. 4 is a schematic diagram of a cover plate of the magnetic detection device according to the present invention;
FIG. 5 is a schematic diagram of a magnetic detection block of the magnetic detection device according to the present invention;
the meaning of the reference numerals in the drawings are:
300-magnetic detection means; 100-base; 100 a-a cabinet; 101-a circular groove; 101 a-a protection groove; 102-a first receiving groove; 103-a magnetic detection block; 103 a-a magnetic detection mechanism; 103 b-calipers; 103 c-a connection base; 104-an indicator light; 105-a damping buffer; 106-a first microswitch; 107-magnetic attraction magnet; 200-cover plate; 201-a main body portion; 202-a baffle; 203-rotating the handle; 204-a second microswitch; 205-ear clip.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" 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.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The magnetic detection device 300 provided by the invention is used for detecting the magnetic pole direction of a workpiece (not shown in the drawings) to be detected as shown in fig. 1 and 2, wherein the magnetic detection device 300 comprises a base 100, a plurality of magnetic detection blocks 103 and a cover plate 200 which can be movably covered on the base 100. Specifically, a cabinet 100a for accommodating a circuit board (not shown in the figure) is also provided below the base 100, and each of the magnetic detection blocks 103 is electrically connected to the circuit board through a connection base 103c at the bottom. In addition, a power module (not shown) is provided in the cabinet 100a for supplying power to the magnetic detection device 300. Optionally, the circuit board is further provided with a communication interface, which can be connected with a computer, so that corresponding data can be read through the computer. In a preferred embodiment, the cover 200 is hinged to the base 100 by a hinge, and the cover 200 may be directly covered on the base 100 without any engagement structure.
Specifically, as shown in fig. 5, the magnetic detection block 103 detects the magnetic pole direction of the magnet in the workpiece to be detected by the magnetic detection mechanism 103a facing the cover 200 side, and the magnetic detection mechanism 103a is not particularly limited as long as it can detect the magnetic path direction. As an example of the magnetic detection mechanism 103a, a magnetoresistive element such as an MR (magnetoresistive effect: magnetro Resistiveeffect) element, a GMR (giant magnetoresistive effect: giant Magnetro Resistive effect) element, a TMR (tunnel magnetoresistive effect: tunnel Magneto Resistance effect) element, or the like can be used.
Further, as shown in fig. 3, the base 100 is provided with a circular groove 101 for placing a workpiece to be detected, and the circular groove 101 is uniformly provided with a plurality of first receiving grooves 102 for placing magnetic detection blocks 103. Specifically, the circular groove 101 is used for placing a workpiece to be inspected, and the workpiece to be inspected in the present embodiment is circular, and in order to match the shape of the workpiece to be inspected, the circular groove 101 is also provided in a circular shape. Further, in order to accommodate the magnetic detection block 103, a first accommodating groove 102 is further provided in the circular groove 101, specifically, the first accommodating groove 102 is a notch opened on the circular groove 101 and communicated to the cabinet 100a, the magnetic detection block 103 is fixed in the notch, one side of the magnetic detection block 103 for detecting the magnetic path direction is directed toward the top cover 200, the side connected with the circuit board is directed toward the cabinet 100a, and the magnetic detection block 103 is electrically connected with the circuit board through a wire.
In an alternative embodiment, the base 100 is further provided with a first micro switch 106, and the first micro switch 106 is connected to the circuit board and is used for detecting whether the cover board 200 is covered. When the cover 200 is closed, the first micro switch 106 is triggered, and the magnetic detection device 300 is set to a detection state, for example, the magnetic detection device 300 is powered on. When the cover plate 200 is opened, the first micro switch 106 can disconnect the power of the magnetic detection device 300, so as to save energy consumption and ensure the safety of users.
In a specific embodiment, a protection groove 101a is further provided at the central position of the base 100, and the protection groove 101a is used to prevent the cover plate 200 from crushing the workpiece to be measured when the workpiece is not placed correctly. When the protection groove 101a is provided, a work piece to be measured that is not placed correctly can enter the protection groove 101a when the cover plate 200 is covered, preventing being crushed by the cover plate 200.
Specifically, as shown in fig. 4, the cover 200 includes a main body 201, a rotating handle 203 disposed on the main body and far from the side of the circular groove 101, and a baffle 202 disposed on the main body 201 and near the side of the circular groove 101, the baffle 202 is connected to the rotating handle 203, when the rotating handle 203 rotates, the baffle 202 presses the workpiece to be detected into the magnetic detecting block 103, and the magnetic detecting block 103 detects the magnetic pole direction of the workpiece to be detected. Specifically, when the cover plate 200 is closed, the shutter 202 presses the workpiece to be detected into the circular groove 101, so that the magnet of the workpiece to be detected enters the detection range of the magnetic detection block 103. Further, the main body 201 is in a disc shape and is fixed to a side of the cover 200 facing away from the rotation handle 203, and the main body 201 serves as a transmission mechanism of the rotation handle 203 and the shutter 202. The rotation shaft of the rotation handle 203 is located at an eccentric position of the main body 201, the baffle 202 is located at an outer periphery of the main body 201, when a user rotates the rotation handle 203, the rotation handle 203 rotates the main body 201 and drives the baffle 202 located at the outer periphery to rotate, a rotation track of the baffle 202 is consistent with that of the circular groove 101, and after one rotation, a workpiece to be detected is completely pressed into the magnetic detection block 103.
In a specific embodiment, the magnetic detection block 103 is provided with a clamp 103b, and the clamp 103b is loosely combined with the baffle 202. Specifically, when the baffle 202 rotates to the magnetic detection block 103, the clamp 103b clamps the baffle 202, so that a user can feel resistance in the rotating process, and thus knows that the baffle 202 rotates to the position of the magnetic detection block 103, and whether the magnetic pole direction of the magnet in the workpiece to be detected corresponding to the position is correct can be further confirmed through the alarm module. Due to the loose engagement of the clamp 103b with the baffle 202
The magnetic detection block 103 is electrically connected with an alarm module, and the alarm module gives an alarm when the magnetic pole direction of the magnet in the workpiece to be detected is wrong. The alarm module is electrically connected with the magnetic detection blocks 103 through the circuit board, and when the magnetic detection blocks 103 detect that the magnetic pole direction of the magnet in the workpiece to be detected is wrong, an alarm is sent out through light and/or sound so as to remind a user that the magnet with the wrong installation is in the workpiece to be detected. Specifically, the alarm module may be an indicator light 104 described later, or may be a buzzer.
The magnetic detection device provided by the invention has the beneficial effects that: by using the magnetic detection block in the magnetic detection device, whether the magnetic poles of the magnets installed in the workpiece are correctly assembled can be detected rapidly, so that the manual burden is reduced, and the magnet assembly error can be accurately positioned through the alarm module.
In a specific embodiment, the number of magnetic sensing blocks 103 is the same as the number of magnets in the workpiece to be sensed. Specifically, in order to further improve the detection efficiency, the number of the magnetic detection blocks 103 provided in the circular groove 101 of the above-described magnetic detection device 300 is the same as the number of the magnets designed in the workpiece to be detected. For example, as shown in fig. 3, if 8 magnets are provided in the workpiece to be inspected, the number of magnetic detection blocks 103 provided in the circular groove 101 is also 8. Therefore, after the rotating handle 203 rotates once, the magnetic detection device 300 can detect all the magnets in the workpiece to be detected at one time, so as to achieve the effect of improving the detection efficiency.
In a specific embodiment, the magnets in the workpiece to be inspected are in one-to-one correspondence with the positions of the magnetic inspection pieces 103. Specifically, in order to further improve the detection efficiency, the positions of the magnetic detection blocks 103 disposed in the circular groove 101 of the magnetic detection device 300 are the same as and correspond to the mounting positions of the magnets in the workpiece to be detected, and as shown in fig. 3, the positions of the 8 magnets in the workpiece to be detected are the same as the positions of the 8 magnetic detection blocks 103 disposed in the circular groove 101 when the workpiece to be detected is mounted in the circular groove 101, that is, when the workpiece to be detected is mounted in the circular groove 101, the magnets inside the workpiece to be detected are just above the corresponding magnetic detection blocks 103. Therefore, after the rotating handle 203 rotates once, the magnetic detection device 300 can detect all the magnets in the workpiece to be detected at one time, so as to achieve the effect of improving the detection efficiency.
In a specific embodiment, the magnetic detection block 103 is connected with an indicator light 104, and the indicator light 104 is used for indicating whether the magnetic path is normal. Specifically, when the magnetic detection block 103 detects an abnormality in the magnetic path between the magnets in the workpiece to be detected, an alarm is given to the operator through the indicator lamp 104. Specifically, the indicator lamp may be a bi-color LED lamp, for example, a red-green bi-color LED lamp, and the LED lamp may display red if the magnetic detection block 103 detects that the magnetic path between the magnets in the workpiece to be detected is abnormal, and green if the magnetic path is normal. In a particular embodiment, one or more indicator lights 104 are provided on the base.
In a simplified embodiment, the indicator light 104 may simply be turned on/off to indicate whether the magnetic circuit is normal, for example, the indicator light 104 may be turned on to indicate that the magnetic circuit is abnormal, and the indicator light may be turned off to indicate that the magnetic circuit is normal, or vice versa. The LED lamp is taken as the indicator lamp 104 as described above by way of example only, and the present embodiment is not limited in any way, and in other alternative embodiments, the indicator lamp 104 may be a light emitting device such as a light bulb, an OLED, or the like.
In a specific embodiment, each magnetic sensing block 103 has a corresponding indicator light 104. Specifically, in order to further improve the detection efficiency, each magnetic detection block 103 has an indicator lamp 104 independently corresponding thereto. Taking fig. 3 as an example, if the magnetic detection device 300 has 8 magnetic detection blocks 103, the base 100 has 8 corresponding indicator lamps 104, and by such an arrangement, after the rotary handle 203 rotates once, the magnetic detection device 300 can directly display whether there is an abnormal magnetic path in the 8 magnets in the workpiece to be detected, i.e. the magnet with error is assembled, by the 8 indicator lamps 104. In other alternative embodiments, the indicator light 104 is a light strip having a plurality of LED lamps, and the same number of LED lamps as the number of magnetic detection blocks 103 may be flexibly used according to the number of magnetic detection blocks 103 to indicate whether an abnormal magnetic path exists.
In a specific embodiment, a buzzer is connected to the magnetic detection block 103, and the buzzer is used for alarming when the magnetic circuit is abnormal. Specifically, when the magnetic detection block 103 detects that the magnetic path between the magnets in the workpiece to be detected is abnormal, an alarm sound is sounded by the buzzer to give an alarm to the operator. Further, a plurality of magnetic detection blocks 103 may be connected to one buzzer, and as the rotary handle 203 rotates, when rotating to a position of a magnet assembled in error, the magnetic detection blocks 103 detect that a magnetic path between the magnets in the workpiece to be detected is abnormal, and the magnetic detection block 103 corresponding to the magnet emits a signal so that the buzzer sounds an alarm.
In a specific embodiment, the cover plate 200 has a second micro switch 204 disposed on the outer periphery of the detection disc 201, the second micro switch 204 being capable of contacting the shutter 202, the second micro switch 204 being used to count the number of rotation cycles of the shutter 202. Specifically, when the rotating handle 203 drives the baffle 202 to rotate, the baffle 202 contacts the second micro switch 204, which can play two roles: firstly, counting the number of rotation cycles of the baffle 202, and further counting how many workpieces to be detected are detected altogether; and secondly, reminding an operator that the workpiece rotates for a circle, and replacing the next workpiece to be detected for detection.
In one particular embodiment, the cover 200 has tabs 205 that snap-engage with the base 100. Specifically, in order to firmly fix the workpiece to be inspected in the circular groove 101, it is necessary to apply pressure to the workpiece to be inspected fixed in the circular groove 101 using the cover plate 200 to prevent the workpiece to be inspected from being ejected out of the circular groove 101 due to its elasticity, and to obtain a good fixing effect, the cover plate 200 has a tab 205 snap-coupled with the base 100, the tab 205 firmly fixing the cover plate 200 to the base 100 and firmly fixing the workpiece to be inspected in the circular groove 101 to ensure a good inspecting effect.
In an alternative embodiment, the base 100 has magnetically bonded magnetically attractable magnets 107. Specifically, in order to firmly fix the workpiece to be inspected in the circular groove 101, it is necessary to apply pressure to the workpiece to be inspected fixed in the circular groove 101 using the cover plate 200 to prevent the workpiece to be inspected from being ejected out of the circular groove 101 due to its elasticity, and to obtain a good fixing effect, the base 100 has a magnetically bonded magnetically attractive magnet 107, which magnet 107 will firmly fix the cover plate 200 to the base 100 by its own magnetic attraction and firmly fix the workpiece to be inspected in the circular groove 101 to ensure a good detecting effect.
In one particular embodiment, the base 100 has a damping bumper 105 that slows the closing force of the cover 200. As described above, in order to firmly fix the workpiece to be inspected in the circular groove 101, it is necessary to apply pressure to the workpiece to be inspected fixed in the circular groove 101 using the cover plate 200, and thus in some possible embodiments, the cover plate 200 has a large weight, and thus when the cover plate 200 is covered on the base 100, a large impact force may be applied to the base 100, which may in turn cause damage to the electronic devices on the base 100. Therefore, in order to avoid the above-mentioned situation, the base 100 has the damping buffer 105 for slowing down the closing force of the cover plate 200, and when the cover plate 200 is closed onto the base 100, the damping buffer 105 plays a role of buffering the cover plate 200, so as to reduce the impact force applied by the cover plate 200 to the base 100, thereby avoiding damage to the electronic devices on the base 100.
The technical features of the above embodiments may be arbitrarily combined, and in order to make the description brief, all possible combinations of the technical features of the above embodiments are not described, however, as long as there is no contradiction between the combinations of the technical features, it should be considered as the scope of the description. Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.
Claims (10)
1. The magnetic detection device is used for detecting the magnetic pole direction of a workpiece to be detected and is characterized by comprising a base, a plurality of magnetic detection blocks and a cover plate which can be movably covered on the base; the base is provided with a circular groove for placing a workpiece to be detected, and the circular groove is uniformly provided with a plurality of first accommodating grooves for placing magnetic detection blocks; the cover plate comprises a main body part, a rotary handle arranged on the main body part and far from one side of the circular groove, and a baffle plate arranged on the main body part and near one side of the circular groove, wherein the baffle plate is connected with the rotary handle, the baffle plate presses the workpiece to be detected into the magnetic detection block when the rotary handle rotates, and the magnetic detection block detects the magnetic pole direction of the workpiece to be detected;
the magnetic detection block is electrically connected with an alarm module arranged on the base, and the alarm module gives an alarm when the direction of the magnetic pole of the magnet in the workpiece to be detected is wrong.
2. The magnetic sensing device of claim 1, wherein: the magnetism detection piece is provided with the calliper, the calliper with the baffle is not hard up to be combined.
3. The magnetic sensing device of claim 1, wherein: the number of the magnetic detection blocks is the same as the number of the magnets in the workpiece to be detected.
4. A magnetic sensing device according to claim 3, wherein: when the workpiece to be detected is placed in the circular groove, the positions of the magnets in the workpiece to be detected are in one-to-one correspondence with the positions of the magnetic detection blocks.
5. The magnetic detection apparatus according to any one of claims 1 to 4, wherein: the magnetic detection block is provided with a magnetic detection mechanism towards one side of the cover plate direction, one side of the magnetic detection block, which is away from the cover plate direction, is provided with a connecting seat for outputting an electric signal, and the magnetic detection mechanism comprises any one of a magneto-resistance effect element, a giant magneto-resistance effect element and a tunnel magneto-resistance effect element.
6. The magnetic sensing device of claim 1, wherein: each magnetic detection block is provided with a corresponding indicator lamp in the alarm module.
7. The magnetic sensing device of claim 1, wherein: the base is provided with a first micro-switch, and the first micro-switch is triggered when the cover plate is covered and used for detecting whether the cover plate is correctly covered.
8. The magnetic sensing device of claim 1, wherein: the cover plate has a second micro switch provided on an outer peripheral portion of the main body portion, and the second micro switch is contactable with the shutter.
9. The magnetic sensing device of claim 1, wherein: the center of the base is provided with a concave protection groove, and the protection groove is used for accommodating the part of the workpiece to be detected, which is not correctly placed into the circular groove, when the cover plate covers the base.
10. The magnetic sensing device of claim 1, wherein: the cover plate is provided with a lug which is combined with the base in a buckling manner, and the lug is used for fastening the cover plate and the base and preventing the workpiece to be detected from falling off from the circular groove.
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| CN202110035378.5A CN112881954B (en) | 2021-01-12 | 2021-01-12 | Magnetism detection device |
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| CN202110035378.5A CN112881954B (en) | 2021-01-12 | 2021-01-12 | Magnetism detection device |
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| CN112881954B true CN112881954B (en) | 2023-08-18 |
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| CN114814676A (en) * | 2022-03-25 | 2022-07-29 | 歌尔股份有限公司 | Magnetism detection device and magnetism check out test set |
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| Title |
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| 弱磁技术在非铁磁性材料检测中的应用研究;廖骏等;《失效分析与预防》;第11卷(第1期);全文 * |
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|---|---|
| CN112881954A (en) | 2021-06-01 |
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Effective date of registration: 20240409 Address after: Building 1, No. 13 Caiwu Gas Station Road, Daojiao Town, Dongguan City, Guangdong Province, 523000 Patentee after: Dongguan Xinfeng Magnetic Industry Technology Co.,Ltd. Country or region after: China Address before: No.6, West Third Industrial Road, Songshanhu high tech Industrial Development Zone, Dongguan City, Guangdong Province, 523000 Patentee before: GUANGDONG EVERWIN PRECISION TECHNOLOGY Co.,Ltd. Country or region before: China |